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roduction;Ratchet mechanisms;Safety engineering;Snap fasteners;Specification (approval);Swing doors;Switch rods;Testing【摘要】: 【中国标准分类号】: Y71【国际标准分类号】: 91_190【页数】: 56P.;A4【正文语种】: 其他 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |