回转支承国家行业标准jbt2300
2021-01-30 02:46
ICS 53. 100 P 97 JB/T 2300-1999 回 转 支 承 Swing bearing 1999-09-17 发布2000-01-01 实施国 家 机 械 工 业 局 发 布 I前言 1 范围······················································································································································································...