00379nam a22001457a 4500003000700000005001700007008004100024082001800065100006700083245002500150250001100175260003400186300000800220650000500228MPLRDC20220104144215.0210129b           ||||| |||| 00| 0 eng d  a446.877 JXGY   a西安交通大学机制教研室, 磨齿工作原理编写组  a磨齿工作原理c  a初版  ab机械工业出版社c1977  b平  a