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41. | push-pull centring |
| 推挽定心 |
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42. | push rod assembly |
| 推杆总成 |
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43. | Push Space Warp |
| 推力空间变形 |
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44. | push-pull photocell |
| 推挽式光电管 |
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45. | push-away buggy |
| 运管子和其它设备的小车 |
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46. | push-down stack |
| 下推栈 |
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47. | push-button socket |
| 按钮式插座 |
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48. | push-pull operation |
| 推拉运行 |
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49. | push-button starter |
| 按钮开关启动器 |
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50. | push-pull shunting |
| 推送调车法 |
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