
Welding and allied processes - Symbolic representation on drawings - Welded joints (ISO 2553:2019)
出版:Comite Europeen de Normalisation

專家解讀視頻
Welding and allied processes - Symbolic representation on drawings - Welded joints (ISO 2553:2019)
出版:Comite Europeen de Normalisation
專家解讀視頻