Txij li thaum lub pob valve tseem ceeb ntawm lub pob valve yog alloy steel sprayed vuam thiab lub nplhaib sealing yog alloy steel overlay welding, lub hard-sealed pob valve ...
Rau cov neeg siv khoom thoob ntiaj teb kev lag luam, kev sib tham tim ntsej tim muag nrog cov tuam txhab lag luam txhim khu kev lag luam tseem yog txoj hauv kev zoo tshaj plaws los xyuas lub zog ntawm lub Hoobkas, xyuas cov khoom zoo thiab sib tham txog cov kev daws teeb meem.