Hauj lwm lawm
Kev tsis
Lub zog cia cov khoom siv tseem ceeb yog ua los ntawm cov khoom siv hluav taws xob, thiab ua kom muaj zog ntawm cov pa roj hmab, thiab ua kom muaj zog ntawm cov pa roj cua, uas yuav cuam tshuam nrog kev sib txawv ntawm cov dej kub. hydrophilic zaj duab xis, nws corrosion tsis kam yog siv cov khoom sib xyaw ua ke, tom qab siv cov txheej txheem hluav taws xob, tom qab siv cov txheej txheem sib xyaw ua ke, tom qab siv cov txheej txheem huab cua, Cov npoo hnav ntawm nias pwm tuaj yeem raug txo kom tsawg, qhov ruaj khov thaum lub zog rolling tau txhim kho, thiab lub zog ntawm lub log tag nrho yog txhim kho {7} {
