1. Thaum yuav khoom, txhua tus neeg yuav tsum xyuas seb lub npoo ntawm tag nrho cov yeeb nkab puas muaj qhov ci, seb nws cov xim puas sib npaug, seb nws cov phab ntsa sab hauv thiab sab nrauv yog du thiab tiaj, thiab seb puas muaj npuas, dents, impurities, thiab lwm yam. Nws yuav tsum tau muab sau tseg tias cov defects saum npoo yuav cuam tshuam rau nws qhov kev ua tau zoo rau qee yam.
2. Qhov thib ob, peb yuav tsum xyuas seb cov khoom piav qhia puas tiav, seb lub cev yeeb nkab puas tau cim nrog cov chaw tsim khoom, cov cim lag luam, hnub tsim khoom, lub npe khoom, qhov loj me, tus qauv kev ua haujlwm, thiab lwm yam., thiab seb nws qhia tau li cas. nominal txheej txoj kab uas hla ntawm cov yeeb nkab steel, yeeb nkab series S, thiab lwm yam., seb lub cim yog meej thiab pom, thiab thaum kawg, peb yuav tsum tau xyuas seb lub cim yog raws li nyob rau hauv qhov tseeb.
3. Vim muaj kev siv ntau ntawm cov khoom siv no, thaum yuav khoom, txhua tus neeg yuav tsum tau yuav cov kav hlau steel ntawm tib lub npe, cov lus qhia tshwj xeeb, thiab cov qauv kom ntseeg tau tias kev ua tau zoo thiab kev teeb tsa. Qhov no yog vim cov khoom sib txawv ntawm cov khoom yuav muaj cov khoom sib txawv, uas tuaj yeem muaj kev cuam tshuam tsis zoo rau kev sib xyaw ntawm cov kav dej thiab fittings. Yog tias siv rau lub sijhawm ntev, nws yooj yim los ua kom tawg ntawm qhov sib koom ua ke.
