
Standard Specification for Steel Forgings, Carbon and Alloy, for Pinions, Gears and Shafts for Reduction Gears
出版:American Society for Testing and Materials

專家解讀視頻
Standard Specification for Steel Forgings, Carbon and Alloy, for Pinions, Gears and Shafts for Reduction Gears
出版:American Society for Testing and Materials
專家解讀視頻