| 1. | Levelling is usually carried out with vertical drill holes . 整平爆破通常用垂直炮眼进行。 |
| 2. | The window was an embrasure in an enormously thick wall . 窗户是个炮眼,墙壁异乎寻常的厚。 |
| 3. | Before charging work is started, the drill holo is plugged . 开始装药以前,先将炮眼下端眼口堵死。 |
| 4. | All gun-ports were open and the muzzles peeped wickedly from them . 所有的炮眼大开,炮口凶狠地从炮眼里伸出来。 |
| 5. | The charge concentration in the contour holes should be as small as possible . 周边炮眼的装药集中度应当尽可能小一点。 |
| 6. | The detonator must be correctly fed into the drill bole during charging work . 在装药工作中,雷管必须正确地放进炮眼。 |
| 7. | All gun-ports were open and the muzzles peeped wickedly from them . 所有的炮眼都开着,炮口不怀好意地从炮眼里向外窥探。 |
| 8. | The plastic hose should have the correct external diameter in relation to the drill hole . 塑料软管的外径应该与炮眼直径相适应。 |
| 9. | The explosive from the lorry is delivered to the shot hole by means of a compressed air . 从卡车上直接用压缩空气将炸药装入炮眼。 |
| 10. | The fact that the drill hole openings are located under water complicates charging work . 炮眼口位于水下,无疑会使装药工作复杂化。 |