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| 炮孔直径通过炮孔圆心，并且两端都在圆周上的直线段，单位为 m 或mm | |||
| 井径 | |||
| 孔径【岩】; 钻孔直径 | |||
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borehole diameter : 18 phrases in 5 subjects |
| Bridge construction | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 4 |
| Hydroelectric power stations | 1 |
| Technology | 11 |
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