Cov txheej txheem rau kev paub qhov zoo ntawm cov raj tooj liab: txheej txheej, sab hauv phab ntsa, khoov

Cov txheej txheem rau kev paub qhov zoo ntawm cov raj tooj liab: txheej txheej, sab hauv phab ntsa, khoov

Cov txheej txheem kom paub qhov zoo ntawm cov raj tooj liab: txheej txheej, sab hauv phab ntsa, thiab khoov.

1. Ua ntej saib txheej txheej ntawm lub raj tooj liab thiab sim txhuam nws nrog cov khoom ntse. Feem ntau, lub raj zoo tooj liab tuaj yeem raug khawb tawm nrog txoj kab sib sib zog nqus, vim tias lub raj zoo tooj liab yog ua los ntawm cov khoom siv tooj liab ntshiab, thiab tooj liab muaj qhov zoo ductility. Tau kawg, cov khoom zoo no feem ntau yog siv hauv kev lag luam tub rog lossis kev lag luam tshwj xeeb.

2. Khawb cov phab ntsa sab hauv ntawm lub raj tooj liab nrog lub cuab yeej ntse. Sib piv cov khoom siv nrog cov khoom siv scraped rau ntawm qhov chaw. Yog tias nws zoo ib yam, nws txhais tau hais tias tag nrho cov khoom tsis zoo. Yog tias muaj xim sib txawv lossis lwm yam, ces tsuas muaj ib qho kev piav qhia, uas yog, lub raj no yog ua los ntawm cov khoom tsis zoo. Feem ntau, tej yam xws li hlau yog ntxiv rau hauv nws.

3. Khoov lub raj tawv dua. Yog tias nws yooj yim khoov, feem ntau nws zoo dua. Yog tias nws tsis yooj yim rau khoov, los yog cov kab nrib pleb tshwm rau ntawm phab ntsa ntawm lub raj tom qab khoov, xyuam xim tshwj xeeb rau cov phab ntsa sab hauv. Thaum nws tshwm sim, lub raj no yog lub raj tsis zoo.