Cov kev cai ntawm kev txheej:
1. Hnav tsis kam, khawb tsis kam, corrosion tsis kam, oxidation tsis kam thiab lwm yam yeeb yaj kiab ua tau zoo
2. Cov yeeb yaj kiab tsis muaj dej thiab tiv thaiv kev ua qias tuaj
Cov Ntsiab Lus Tseem Ceeb ntawm Zhenhua Program:
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Muab cov khoom siv txheej thiab kev txhawb nqa kev siv tshuab txheej rau cov chaw tsim khoom lag luam thiab cov neeg siv khoom.
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Muab cov kev daws teeb meem zoo, zoo, thiab pheej yig rau kev tsim kho tshiab tas mus li thiab kev loj hlob ntawm kev lag luam.
