Kev tshuaj xyuas cov yeeb nkab hlau thiab daim ntawv qhia txog qhov chaw nrhiav tau ntawm MTC:ASTM A53 B/ASTM A106 B/API 5L B
Yuav kom ntseeg tau tias cov yeeb nkab hlau ua tau raws li cov neeg siv khoom xav tau, tus neeg thib peb tau ua qhov kev tshuaj xyuas zoo nkauj thiab kev kuaj xyuas qhov chaw tsis raug ntawm cov khoom.
1. Kev tshuaj xyuas cov yeeb nkab hlau
Cov ntsiab lus tshuaj xyuas muaj xws li:
Qhov tiav ntawm qhov chaw: xyuas kom meej tias tsis muaj qhov tsis zoo xws li tawg, qhov, xeb, thiab lwm yam.
Qhov kawg ntawm lub ntsej muag: xyuas kom meej tias qhov txiav yog tiaj tus thiab tsis muaj burr.
Qhov Loj: Kev ntsuas cov qauv ntawm cov yeeb nkab hlau txoj kab uas hla thiab phab ntsa tuab kom ntseeg tau tias ua raws li cov qauv qhia.
2. MTC thiab kev tshuaj xyuas cov khoom lag luam
Tshawb xyuas cov ntaub ntawv pov thawj zoo (MTC) ntawm qee cov kav hlau kom paub tseeb tias lawv puas sib xws nrog lub logo khoom tiag tiag. Txheeb xyuas qhov tseeb thiab kev taug qab ntawm MTC los ntawm cov ntaub ntawv xws li tus lej serial thiab tus lej batch kom ntseeg tau tias qhov chaw ntawm cov khoom yog qhov tseeb thiab txhim khu kev qha.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-03-2024
