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41. | The unseen ferry-boat was blowing blast after blast. |
| 那看不见的渡船,一阵又一阵地发出汽笛声。 |
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42. | duration of blast |
| 吹炼期,吹炼时间 |
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43. | blast furnace products |
| 高炉产品 |
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44. | air blast effect |
| 空气冲击波效应;空中爆炸效应 |
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45. | Hydrogen bomb blast. |
| 氢弹爆炸。 |
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46. | blast the granite |
| 爆破花岗岩 |
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47. | hot Blast stove |
| 热风炉 |
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48. | electric blast furnace |
| 电高炉 |
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49. | blast-proof construction |
| 建筑防爆 |
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50. | air blast freezing |
| 强制通风冻结 |
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