发布时间:2025-01-17 01:14:59
更正一下:燕尾槽和键槽是两个概念。
燕尾槽用于工作台的导向。
键槽用于在轴类零件上安装键。
键槽没必要加工成燕尾形
燕尾槽也更不是键槽
27个省社保系统切换至全国系统国务院社保数据纳入共享全国联网来了
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