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51. | recoil ionization chamber |
| 反冲电离室 |
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52. | recoil piston rod |
| 驻退杆|驻退活塞杆 |
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53. | recoil-counterrecoil mechanism |
| 制退复进机 |
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54. | fast recoil ion |
| 快反冲离子 |
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55. | proton recoil chamber |
| 反冲质子电离室 |
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56. | recoil fission fragment |
| 反冲裂变碎片 |
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57. | hydraulic recoil mount |
| 液压制退的炮架 |
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58. | recoil-operated action |
| 枪管后座式动作 |
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59. | impact of recoil |
| 反跳冲击 |
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60. | heavy recoil oil |
| 重反冲油,重后座油 |
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