ASME B1.7M-1984 nomenclature,definitions,and letter symbols for screw threads
时间：2011-02-16 08:23:43 来源：中国标准网 作者：不详
ASME B1.7M-1984 nomenclature,definitions,and letter symbols for screw threads ASME B1.7M-1984 nomenclature,definitions,and letter symbols for screw threads
