Reciprocating twjyog tsim thiab tsim raws li cov kua dej tshwj xeeb lossis nruab nrab los ntawm cov neeg siv khoom kawg ntawm cov roj av, roj refinery, minings, thee minings, fais fab nroj tsuag lossis architechture water supply constructions.
Cov kev xaiv ntawm cov ntaub ntawv rau cov kua dej kawg yog tus yuam sij ntawm lub twj tso kua mis lub cev.Qee qhov yuav tsum tau siab -kub, ib txhia xav tau tshwj xeeb electroplating los xyuas kom meej tag nrho cov feem ntawm cov kua kawg nyob rau hauv ib tug nyab xeeb, ruaj khov thiab zoo-lub xeev kaw.
Peb lub tuam txhab tau muab tus nqi ntau ntawm cov khoom siv sib xws, cov cuab yeej ntsuas thiab ntsuas thiab kev cob qhia cov neeg ua haujlwm. Txhua qhov kev kho tshwj xeeb raug tua thiab sau tseg raws li cov duab kos thiab cov qauv kev lag luam.