Mucherechedzo wepamusoro uye pasi mahwendefa ekuputira vacuum hauna kunaka, uye ruvara rwemigumo miviri yeplate yakasiyana.Mukuwedzera, chii chinonzi blackening ruvara?Injiniya kubva kuRich Special Materials Co., Ltd, VaMu Jiangang, vanotsanangura zvikonzero.Kusviba kunokonzerwa nemhepo yakasara ...
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