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

专家解读视频
Standard Specification for Steel Forgings, Carbon and Alloy, for Pinions, Gears and Shafts for Reduction Gears
出版:American Society for Testing and Materials
专家解读视频