Ukusetshenziswa kwe-Titanium Alloy embonini yeValve
Ingxubevange ye-Titanium inezinzuzo eziningi njengokuminyana okuphansi, amandla aphezulu, ukumelana nokugqwala, izinga lokushisa eliphezulu nokumelana nokushisa okuphansi, futhi ingasetshenziswa kabanzi emikhakheni eminingi efana ne-petroleum...
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