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| 隧道顶钎; 顶板锚杆支护; 隧洞顶栓; 隧洞顶钎 | |||
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| 屋顶锚杆; 隧洞洞顶锚栓; 顶板锚杆栓; 顶板螺栓 | |||
| 顶板锚杆; 層面螺栓 | |||
| 洞顶锚栓 | |||
| 顶栓; 杆柱; 隧道洞顶锚栓; 护顶锚杆; 隧道等顶部锚定螺栓 | |||
| roof bolting: 26 phrases in 3 subjects |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 23 |
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