... 动力弹簧,发条 power spring 圆头平键 Pratt-Whitney key 线条俦顺序 precedence of lines ...
基于8个网页-相关网页
... 圆头平键 P & W key(Pratt and Whitney key) 节,节距,螺距,沥膏 P(p,pitch) 渗碳硬 化 pack hardening ...
基于6个网页-相关网页
短语
圆头普通平键
round end parallel key
单圆头普通平键
single round parallel key
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