NQUS HLAU DAB TSHUAB
Cov Khoom Qhia Luv:
- Cov Khoom Siv Zoo Tshaj Plaws Kav Rau Ntau Yam Kev Lag Luam
- Txhim khu kev qha thiab ruaj khov rau kev siv sijhawm ntev
- Customizable ntev thiab ntau thiab tsawg rau ntau yam teeb tsa
- Tsim los rau cov khoom siv nqus tshuab ua haujlwm thiab txhim kho kev tsim khoom
- Kev sib tw nqi thiab tshwj xeeb tus nqi rau nyiaj
- Tsim los ntawm lub Hoobkas ua lag luam tsim kom paub tseeb
Khoom Paub meej:
- Zoo tshaj qhov zoo thiab durability: peb nqus cov hlau yeeb nkab muaj cov kev ua kom zoo thiab ruaj khov, ua rau lawv zoo meej rau ntau cov ntawv thov. Crafted los ntawm cov ntaub ntawv zoo, cov kav dej no tuaj yeem tiv taus kev ua haujlwm nyuaj, ua kom muaj kev saib xyuas ntev thiab txo cov kev saib xyuas.
- Customizable ntev thiab ntau thiab tsawg: peb nkag siab tias txhua yam kev lag luam tshwj xeeb, uas yog vim li cas peb lub tshuab nqus hluav taws xob muaj nyob hauv customizable ntev thiab ntau thiab tsawg. Txawm hais tias koj xav tau ib qho teeb meem tshwj xeeb lossis cov yeeb nkab txuas ntxiv, peb tuaj yeem haum koj cov kev xav tau, muab cov kev daws teeb meem rau kev sib koom ua ke rau hauv koj cov teeb meem tam sim no.
- High Efficiency rau txhim kho cov khoom lag luam: tsim nrog kev ua tau zoo hauv lub siab, peb lub tshuab nqus hluav taws xob series rau lub zog ua haujlwm hauv lub tshuab nqus tsev, ua rau muaj kev tsim khoom zoo. Cov kav dej no txo qis kev nyuaj, tso cai rau kev ua kom zoo dua qub thiab ntau dua kev ua haujlwm. Ua tiav qhov siab tshaj plaws hauv koj cov txheej txheem muaj kev siv nrog peb txoj kev txhim khu kev qha cov yeeb nkab series.
- Kev sib tw nqi thiab tus nqi rau nyiaj: ua tus nqi tsim khoom lag luam, peb muab cov khaub ncaws sib tw, kom koj tau txais txiaj ntsig zoo rau koj cov peev txheej. Peb ua ntej cov neeg siv khoom txaus siab thiab siv zog xa cov khoom lag luam uas tau raws li koj qhov kev xav tau zoo yam tsis tau rhuav koj cov peev nyiaj.
Hauv kev xaus, peb lub tshuab nqus tsev cov yeeb nkab muab cov kev daws teeb meem rau cov tshuab nqus hluav taws xob hauv ntau cov ntawv thov. Nrog lawv cov kev xaiv zoo dua, cov nqi sib tw, thiab cov nqi sib tw, peb lub tshuab nqus tsev muaj cov txiaj ntsig tshwj xeeb rau nyiaj. Txawj tej yam ntxiv koj txoj haujlwm muaj kev lag luam nrog peb cov kev ua lag luam tshiab cov yeeb nkab thiab kev ua kom zoo dua cov khoom lag luam thiab kev ua tau zoo. Xaiv peb lub Hoobkas tsim rau kev txhim khu kev qha thiab cov khoom ruaj khov uas tau raws li koj cov kev xav tau tshwj xeeb. Yog xav paub ntxiv, thov hu rau peb.
Daim duab
Lub Tshuab Nqus Tsev Ronsulated Piping
Lub tshuab nqus tsev insulated (vi piping), uas yog lub tshuab nqus tsev jackinged yeeb (vj piping), raws li ib qho zoo tshaj plaws hloov chaw rau cov piping piping rwb thaiv tsev. Piv nrog cov piping cov piping rwb thaiv tsev, cov cua sov kom tus nqi ntawm VIP tsuas yog 0.035 zaug ntawm cov piping piping rwb thaiv tsev. Tseem txuag txuag lub zog thiab tus nqi rau cov neeg siv khoom.
Cov khoom series ntawm lub tshuab nqus tsev Jose, lub tshuab ua kom zoo nkauj, yog siv rau kev hloov ua kua, ua kua nitrogen, kua argon, kua hydrogen, cov kua rau hauv caug, ceg thiab cov khoom lag luam, cov khoom siv hluav taws xob, cov tshuab raj, khoom siv hluav taws xob, khoom noj khoom haus & dej, tsev muag tshuaj, tsev kho mob, roj hmab, khoom siv tshiab tsim tshuaj engineering, Hlau & Science etc.
Peb hom kev sib txuas ntawm VI PIPING
Qhov peb txuas txuas ntawm no tsuas yog siv rau cov haujlwm sib txuas ntawm VI kav. Thaum VI yeeb nkab txuas nrog cov cuab yeej siv, ntim tank thiab lwm yam tuaj yeem kho tau raws li cov neeg siv khoom.
Txhawm rau kom ua kom tiav cov kev xav tau ntawm cov neeg siv khoom sib txawv, lub tshuab nqus tsev insulated tau tsim peb hom kev sib txuas, lub tshuab nqus tsev bayoning thiab bolts thiab welded txuas hom. Lawv nyias muaj qhov zoo sib txawv thiab tsim nyog rau cov haujlwm sib txawv.
Cov tau txais daim ntawv thov
VAcuum Bayonet Kev Txuas Txuas Hom nrog Clamps | Nqus bayonet txuas hom nrog flanges thiab bolts | Welded Txuas Hom | |
Kev Sib Txuas Hom | Clamps | Flanges thiab bolts | Weld |
Rwb thaiv tsev hom ntawm pob qij txha | Lub tshuab nqus tsev | Lub tshuab nqus tsev | Perlite lossis lub tshuab nqus tsev |
On-site ovulated kev kho mob | No | No | Yog lawm, perlite tau sau rau hauv lossis lub tshuab nqus tsev tawm ntawm cov tes tsho insulated ntawm pob qij txha. |
Nominal diam ntawm cov yeeb nkab sab hauv | DN10 (3/8 ") ~ DN25 (1") | DN10 (3/8 ") ~ Dn80 (3") | DN10 (3/8 ") ~ Dn500 (20") |
Tsim Kev Tsim Nyuaj Siab | ≤8 bar | Hais lus Bar | 5064 bar |
Kev muab cia | Yooj yim | Yooj yim | Weld |
Tsim Ntsuas Kub | -196 ℃ ~ 90 ℃ (LH2 & LHE: -270 ℃ ~ 90 ℃) | ||
Qho ntev | 1 ~ 8.2 'meter' / pcs | ||
Khoom | 300 series cov hlau stainless | ||
Nruab nrab | LN2, LEX, LAT, LHE, LH2, Txhais ceg, lng |
Khoom Muag Khoom Ntawm Cov Khoom Noj
Khoom | Kev qhia tshwj xeeb | Nqus Plastamonet Kev Txuas Nrog Clamps | Nqus bayonet txuas nrog flanges thiab bolts | Weld Insulated Kev Txuas |
Lub Tshuab Nqus Tsev Insulated | Dn8 | Tau | Tau | Tau |
DN15 | Tau | Tau | Tau | |
Dn20 | Tau | Tau | Tau | |
DN25 | Tau | Tau | Tau | |
Dn32 | / | Tau | Tau | |
Dn40 | / | Tau | Tau | |
Dn50 | / | Tau | Tau | |
DN65 | / | Tau | Tau | |
Dn80 | / | Tau | Tau | |
DN100 | / | / | Tau | |
DN125 | / | / | Tau | |
DN150 | / | / | Tau | |
Dn200 | / | / | Tau | |
DN250 | / | / | Tau | |
Dn300 | / | / | Tau | |
DM400 | / | / | Tau | |
DM500 | / | / | Tau |
Cov yam ntxwv ua txuj ci
Tus Npee Tsim Tsim Kev Tsim Nyog | ≥4.0MPA |
Tsim Ntsuas Kub | -196C ~ 90 ℃ (lh2& Lhe: -270 ~ 90 ℃) |
Thaj kub cua sov | -50 ~ 90 ℃ |
Nqus plua plav toaste | ≤1 * 10-10Pa*m3/S |
Nqus theem tom qab lav | ≤0.1 pa |
Insulated txoj kev | Siab nqus plua plav ntau-txheej rwb thaiv tsev. |
Adsorbent thiab getter | Tau |
Nde | 100% Kev Ntsuas Hluav Taws Xob |
Ntsuas Siab | 1.15 zaug tsim kev tsim siab |
Nruab nrab | LO2, Ln2, Lar, LH2, Lhe, ceg, lng |
Dynamic thiab lub tshuab nqus tsev zoo nkauj insulated
Lub tshuab nqus tsev insulated (vi) cov raj xa dej tuaj yeem faib ua cov qauv tshiab thiab zoo li VI PIPING system.
lLub zoo li cov vi piping yog ua tiav rau hauv lub hoob tsim khoom lag luam.
lLub Dynamic Vi Piping yog muab ntau dua lub chaw nqus tsev lub xeev los ntawm kev ua haujlwm nqus plua plav ntawm lub tsev sib dhos thiab kev kho mob yog tseem nyob hauv cov chaw tsim khoom.
Dynamic Nqus Insulated Piping System | Lub tshuab nqus lub cav hluav taws xob zoo li qub | |
Lub hauv paus rau phau ntawv | Lub tshuab nqus tsev ntawm lub tshuab nqus tsev interllayer yog tus saib xyuas tsis tu ncua, thiab lub tshuab nqus tsev tau tswj hwm kom meej thiab kom ntseeg tau tias lub tshuab nqus tsev | VJPS ua tiav lub tshuab nqus tsev ua haujlwm nyob rau hauv kev tsim khoom cog. |
Qhov Zoo | Lub tshuab nqus tsev khaws cia yog qhov ruaj khov, thaiv cov tshuab nqus tsev ua haujlwm yav tom ntej. | Kev nqis peev ntau dua thiab cov khoom siv yooj yim rau ntawm chaw teeb tsa |
Nqus Plasting Txuas Hom nrog Clamps | Tus kawm | Tus kawm |
Nqus bayonet txuas hom nrog flanges thiab bolts | Tus kawm | Tus kawm |
Welded Txuas Hom | Tus kawm | Tus kawm |
Dynamicual haub nqus dej istulated kav dej: muaj cov kav tshuab nqus tsev av insulated, jumper ntxig thiab nqus cov twj nqus tsev, solenoid li qub thiab nqus pa gauges).
Kev qhia tshwj xeeb thiab qauv
HL-PX-X-000-00-X
Hom
Hl cryogenic khoom
Kev piav txog
PD: Dynamic Vi Yeeb Nkab
PS: Static VI Yeeb Nkab
Kev Sib Txuas Hom
W: Welded hom
B: Lub tshuab nqus tsev bayonet nrog clamps
F: Lub tshuab nqus phom bayonet nrog flanges thiab bolts
Nominal diam ntawm cov yeeb nkab sab hauv
010: DN10
...
080: DN80
...
500: Dn500
Tsim Kev Tsim Nyuaj Siab
08: 8bar
16: 16bar
25: 25bar
32: 32BAR
40: 40bar
Cov Khoom Siv Hauv Cov Hlau Sab Hauv
A: SS304
B: ss304l
C: SS316
D: ss316l
E: Lwm yam
Lub tshuab nqus lub cav hluav taws xob zoo li qub
Mkua hlau | Kev sib txuaNtaus | Nominal diam ntawm cov yeeb nkab sab hauv | Tsim Kev Tsim Nyuaj Siab | KhoomNtawm cov yeeb nkab sab hauv | Lub hom phiaj | Hais txog |
HlpsB01008X | Lub Tshuab Nqus Tsev Bayason Txuas Hom nrog Clamps Rau Cov Pipic Insulated Kav Hlau | DN10, 3/8 " | 8 bar
| 300 series cov hlau stainless | ASME B31.3 | X: Cov khoom siv sab hauv cov yeeb nkab. A yog 304, B yog 304l, C yog 316, D yog 316L, E yog lwm yam. |
HlpsB01508X | DN15, 1/2 " | |||||
HlpsB02008X | DN20, 3/4 " | |||||
HlpsB02508X | DN25, 1 " |
Nominal Diam Ntawm Cov Hlau Sab Hauv:Pom zoo ≤ DN25 lossis 1 ". Los yog xaiv lub tshuab nqus tsev Bayonet thiab bolts (los ntawm DN10, 3/8" rau DN500, 20 " )
Nominal Dever ntawm txheej yeeb:Pom zoo los ntawm cov qauv kev lag luam ntawm hn cryogenic khoom. Nws tseem tuaj yeem tsim raws li cov neeg siv khoom ntawm cov qhua tuaj noj mov.
Tsim Nyuaj Siab: Pom zoo ≤ 8 bar. Los yog xaiv lub tshuab nqus tsev bayonet txuas hom nrog flanges thiab bolts (≤16 bar), Welded Connect hom (≤64 bar)
Cov khoom siv ntawm cov yeeb nkab sab nraud: Yog tsis muaj kev ua tshwj xeeb, cov khoom siv sab hauv thiab sab nraud yeeb nkab yuav raug xaiv tib yam.
Mkua hlau | Kev sib txuaNtaus | Nominal diam ntawm cov yeeb nkab sab hauv | Tsim Kev Tsim Nyuaj Siab | KhoomNtawm cov yeeb nkab sab hauv | Lub hom phiaj | Hais txog |
HlpsF01000X | Lub Tshuab Nqus Tsev Bayason Txuas nrog Flanges thiab Bolts Rau Cov Piping Insulated Kav Hlau | DN10, 3/8 " | 8 ~ 16 bar | 300 series cov hlau stainless | ASME B31.3 | 00: Tsim kev siab. 08 yog 8bar, 16 yog 16bar.
X: Cov khoom siv sab hauv cov yeeb nkab. A yog 304, B yog 304l, C yog 316, D yog 316L, E yog lwm yam. |
HlpsF01500X | DN15, 1/2 " | |||||
HlpsF02000X | DN20, 3/4 " | |||||
HlpsF02500X | DN25, 1 " | |||||
HlpsF03200X | DN32, 1-1 / 4 " | |||||
HlpsF04000X | DN40, 1-1 / 2 " | |||||
HlpsF05000X | DN50, 2 " | |||||
HlpsF06500X | DN65, 2-1 / 2 " | |||||
HlpsF08000X | DN80, 3 " |
Nominal Diam Ntawm Cov Hlau Sab Hauv:Pom zoo ≤ DNT80 lossis 3 ". Los yog xaiv Welded Txuas Hom (los ntawm DNSWAYS txuas hom nrog clamps (los ntawm DNTE BAYSWS (los ntawm DNTE BAYSWS (los ntawm DNTE BAYSWS (los ntawm DN10, 3/8" rau DN25, 1 ").
Nominal Dever ntawm txheej yeeb:Pom zoo los ntawm cov qauv kev lag luam ntawm hn cryogenic khoom. Nws tseem tuaj yeem tsim raws li cov neeg siv khoom ntawm cov qhua tuaj noj mov.
Tsim Nyuaj Siab: Pom zoo ≤ 16 bar. Lossis xaiv Welded Txuas Hom (≤64 bar).
Cov khoom siv ntawm cov yeeb nkab sab nraud: Yog tsis muaj kev ua tshwj xeeb, cov khoom siv sab hauv thiab sab nraud yeeb nkab yuav raug xaiv tib yam.
Mkua hlau | Kev sib txuaNtaus | Nominal diam ntawm cov yeeb nkab sab hauv | Tsim Kev Tsim Nyuaj Siab | KhoomNtawm cov yeeb nkab sab hauv | Lub hom phiaj | Hais txog |
HlpsW01000X | Welded Txuas Ntaus Rau Zoo Li Lub Tshuab Nqus Insulated Piping System | DN10, 3/8 " | 8 ~ 64 bar | 300 series cov hlau stainless | ASME B31.3 | 00: Tsim Kev Tsim Nyuaj Siab 08 yog 8bar, 16 yog 16bar, Thiab 25, 32, 40, 64.
X: Cov khoom siv sab hauv cov yeeb nkab. A yog 304, B yog 304l, C yog 316, D yog 316L, E yog lwm yam. |
HlpsW01500X | DN15, 1/2 " | |||||
HlpsW02000X | DN20, 3/4 " | |||||
HlpsW02500X | DN25, 1 " | |||||
HlpsW03200X | DN32, 1-1 / 4 " | |||||
HlpsW04000X | DN40, 1-1 / 2 " | |||||
HlpsW05000X | DN50, 2 " | |||||
HlpsW06500X | DN65, 2-1 / 2 " | |||||
HlpsW08000X | DN80, 3 " | |||||
HLpsw10000X | DN100, 4 " | |||||
HLPSW M12500X | DN125, 5 " | |||||
HLpsw15000X | DN150, 6 " | |||||
HLpsw20000X | DN200, 8 " | |||||
HLpsw25000X | DN250, 10 " | |||||
HLPSW30000X | DN300, 12 " | |||||
HLPSW35000X | DN350, 14 " | |||||
HLPSW40000X | DN400, 16 " | |||||
HLpsw45000X | DN450, 18 " | |||||
HLPSW50000X | Dn500, 20 " |
Nominal Dever ntawm txheej yeeb:Pom zoo los ntawm cov qauv kev lag luam ntawm hn cryogenic khoom. Nws tseem tuaj yeem tsim raws li cov neeg siv khoom ntawm cov qhua tuaj noj mov.
Cov khoom siv ntawm cov yeeb nkab sab nraud: Yog tsis muaj kev ua tshwj xeeb, cov khoom siv sab hauv thiab sab nraud yeeb nkab yuav raug xaiv tib yam.
Dynamic Nqus Insulated Piping System
Mkua hlau | Kev sib txuaNtaus | Nominal diam ntawm cov yeeb nkab sab hauv | Tsim Kev Tsim Nyuaj Siab | KhoomNtawm cov yeeb nkab sab hauv | Lub hom phiaj | Hais txog |
HlpDB01008X | Lub Tshuab Nqus Tsev Bayason Txuas Hom nrog Clamps Rau Cov Pipic Insulated Kav Hlau | DN10, 3/8 " | 8 bar | 300 series cov hlau stainless | ASME B31.3 | X:Cov khoom siv sab hauv cov yeeb nkab. A yog 304, B yog 304l, C yog 316, D yog 316L, E yog lwm yam. |
HlpdB01508X | DN15, 1/2 " | |||||
HlpdB02008X | DN20, 3/4 " | |||||
HlpdB02508X | DN25, 1 " |
Nominal Diam Ntawm Cov Hlau Sab Hauv:Pom zoo ≤ DN25 lossis 1 ". Los yog xaiv lub tshuab nqus tsev Bayonet thiab bolts (los ntawm DN10, 3/8" rau DN500, 20 " )
Nominal Dever ntawm txheej yeeb:Pom zoo los ntawm cov qauv kev lag luam ntawm hn cryogenic khoom. Nws tseem tuaj yeem tsim raws li cov neeg siv khoom ntawm cov qhua tuaj noj mov.
Tsim Nyuaj Siab: Pom zoo ≤ 8 bar. Los yog xaiv lub tshuab nqus tsev bayonet txuas hom nrog flanges thiab bolts (≤16 bar), Welded Connect hom (≤64 bar)
Cov khoom siv ntawm cov yeeb nkab sab nraud: Yog tsis muaj kev ua tshwj xeeb, cov khoom siv sab hauv thiab sab nraud yeeb nkab yuav raug xaiv tib yam.
Fais fab mob:Lub vev xaib yuav tsum tau muab lub zog ua kom haum rau lub tshuab nqus tsev mus rau lub tshuab nqus tsev thiab qhia kom halry cov ntaub ntawv hluav taws xob cov ntaub ntawv hluav taws xob hauv nroog (voltage thiab hertz)
Mkua hlau | Kev sib txuaNtaus | Nominal diam ntawm cov yeeb nkab sab hauv | Tsim Kev Tsim Nyuaj Siab | KhoomNtawm cov yeeb nkab sab hauv | Lub hom phiaj | Hais txog |
HlpDF01000X | Lub Tshuab Nqus Tsev Bayason Txuas nrog Flanges thiab Bolts Rau Cov Piping Insulated Kav Hlau | DN10, 3/8 " | 8 ~ 16 bar | 300 series cov hlau stainless | ASME B31.3 | 00: Tsim kev siab. 08 yog 8bar, 16 yog 16bar.
X: Cov khoom siv sab hauv cov yeeb nkab. A yog 304, B yog 304l, C yog 316, D yog 316L, E yog lwm yam. |
HlpdF01500X | DN15, 1/2 " | |||||
HlpdF02000X | DN20, 3/4 " | |||||
HlpdF02500X | DN25, 1 " | |||||
HlpdF03200X | DN32, 1-1 / 4 " | |||||
HlpdF04000X | DN40, 1-1 / 2 " | |||||
HlpdF05000X | DN50, 2 " | |||||
HlpdF06500X | DN65, 2-1 / 2 " | |||||
HlpdF08000X | DN80, 3 " |
Nominal Diam Ntawm Cov Hlau Sab Hauv:Pom zoo ≤ DNT80 lossis 3 ". Los yog xaiv Welded Txuas Hom (los ntawm DNSWAYS txuas hom nrog clamps (los ntawm DNTE BAYSWS (los ntawm DNTE BAYSWS (los ntawm DNTE BAYSWS (los ntawm DN10, 3/8" rau DN25, 1 ").
Nominal Dever ntawm txheej yeeb:Pom zoo los ntawm cov qauv kev lag luam ntawm hn cryogenic khoom. Nws tseem tuaj yeem tsim raws li cov neeg siv khoom ntawm cov qhua tuaj noj mov.
Tsim Nyuaj Siab: Pom zoo ≤ 16 bar. Lossis xaiv Welded Txuas Hom (≤64 bar).
Cov khoom siv ntawm cov yeeb nkab sab nraud: Yog tsis muaj kev ua tshwj xeeb, cov khoom siv sab hauv thiab sab nraud yeeb nkab yuav raug xaiv tib yam.
Fais fab mob:Lub vev xaib yuav tsum tau muab lub zog ua kom haum rau lub tshuab nqus tsev mus rau lub tshuab nqus tsev thiab qhia kom halry cov ntaub ntawv hluav taws xob cov ntaub ntawv hluav taws xob hauv nroog (voltage thiab hertz)
Mkua hlau | Kev sib txuaNtaus | Nominal diam ntawm cov yeeb nkab sab hauv | Tsim Kev Tsim Nyuaj Siab | KhoomNtawm cov yeeb nkab sab hauv | Lub hom phiaj | Hais txog |
HlpDW01000X | Welded Txuas Hom Rau Dynamic Nqus Insulated Piping System | DN10, 3/8 " | 8 ~ 64 bar | Tus Hlau Stainless 304, 304L, 316, 316L | ASME B31.3 | 00: Tsim Kev Tsim Nyuaj Siab 08 yog 8bar, 16 yog 16bar, Thiab 25, 32, 40, 64. .
X: Cov khoom siv sab hauv cov yeeb nkab. A yog 304, B yog 304l, C yog 316, D yog 316L, E yog lwm yam. |
HlpDW01500X | DN15, 1/2 " | |||||
HlpDW02000X | DN20, 3/4 " | |||||
HlpDW02500X | DN25, 1 " | |||||
HlpdW03200X | DN32, 1-1 / 4 " | |||||
HlpdW04000X | DN40, 1-1 / 2 " | |||||
HlpdW05000X | DN50, 2 " | |||||
HlpdW06500X | DN65, 2-1 / 2 " | |||||
HlpdW08000X | DN80, 3 " | |||||
HLPDW10000X | DN100, 4 " | |||||
HLPDW12500X | DN125, 5 " | |||||
HLPDW15000X | DN150, 6 " | |||||
HLpdw20000X | DN200, 8 " | |||||
HLPDW25000X | DN250, 10 " | |||||
HLPDW30000X | DN300, 12 " | |||||
HLPDW35000X | DN350, 14 " | |||||
HLPDW40000X | DN400, 16 " | |||||
HLPDW45000X | DN450, 18 " | |||||
HLPDW50000X | Dn500, 20 " |
Nominal Dever ntawm txheej yeeb:Pom zoo los ntawm cov qauv kev lag luam ntawm hn cryogenic khoom. Nws tseem tuaj yeem tsim raws li cov neeg siv khoom ntawm cov qhua tuaj noj mov.
Cov khoom siv ntawm cov yeeb nkab sab nraud: Yog tsis muaj kev ua tshwj xeeb, cov khoom siv sab hauv thiab sab nraud yeeb nkab yuav raug xaiv tib yam.
Fais fab mob:Lub vev xaib yuav tsum tau muab lub zog ua kom haum rau lub tshuab nqus tsev mus rau lub tshuab nqus tsev thiab qhia kom halry cov ntaub ntawv hluav taws xob cov ntaub ntawv hluav taws xob hauv nroog (voltage thiab hertz)