unc unified national coarse thread的意思|示意
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英 / /
Unc统一国家粗螺纹
unc unified national coarse thread的网络常见释义
统一标准粗牙螺纹 统一标准粗牙螺纹 unc thread; unc unified national coarse thread; unified coarse thread 统一标准螺纹规 unified screw thread gauge .