美标国标金属材质对照表(其中GB材质为老标)
MATERIAL CONVERSION/SUBSTITUTION TO CHINESE STANDARD MATERIAL (Including Attachments and internals)
MATERIAL CONVERSION/SUBSTITUTION TO CHINESE STANDARD MATERIAL (Including Attachments and internals)
MATERIAL CONVERSION/SUBSTITUTION TO CHINESE STANDARD MATERIAL (Including Attachments and internals)
相关主题