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4. Indlela yokugquma nge-vacuum yefilimu yokulwa ne-oxidation yeentsimbi ezixabisekileyo kunye neemveliso zokugquma ngentsimbi ezixabisekileyo

Umthombo wenqaku: I-vacuum yaseZhenhua
Funda: 10
Ipapashwe: 22-12-08

Ixesha lokuthumela: Disemba-08-2022