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41. | metallizing gun |
| 金属喷镀枪 |
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42. | gun displacement |
| 炮位移 |
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43. | electrostatic gun |
| 静电聚焦电子枪;静电聚焦电子枪 |
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44. | unipotential gun |
| 单电位电子枪 |
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45. | percussion gun |
| 雷管枪 |
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46. | gun perforation |
| 射孔 |
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47. | morning gun |
| 早晨升旗礼炮 |
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48. | perforating gun |
| 射孔枪 |
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49. | antiaircraft gun |
| 高射炮 |
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50. | Antitank gun |
| 反坦克炮 |
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