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roof bolt
el. 屋顶锚杆; 隧洞洞顶锚栓; 顶板锚杆栓; 顶板螺栓
eng.geol. 顶板锚杆; 層面螺栓
hydroel.st. 洞顶锚栓
tech. 顶栓; 杆柱; 隧道洞顶锚栓; 护顶锚杆; 隧道等顶部锚定螺栓
roof-bolt
: 12 phrases in 2 subjects
Electronics1
Technology11

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