Cov kev cai ntawm kev txheej:
1. Txheej ntau yam yeeb yaj kiab kho qhov muag.
2. Txheej AF waterproof thiab antifouling zaj duab xis.
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 khoom siv txheej thiab kev txhawb nqa kev siv tshuab txheej rau cov chaw tsim khoom lag luam thiab cov neeg siv khoom.
