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| 51. | Precision Grinding |
| 精密磨削 |
|
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| 52. | microfroc filter |
| 精密过滤机 |
|
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| | |
| 53. | precision acidity meter |
| 精密酸度计 |
|
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| | |
| 54. | precision lead scre |
| 精密丝杠 |
|
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| | |
| 55. | precision assembly |
| 精密装备 |
|
|
| | |
| 56. | precision engineering |
| 精密工程 |
|
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| | |
| 57. | Precision Castings |
| 精密铸造件 |
|
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| | |
| 58. | precision interval clock |
| 精密时钟 |
|
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| | |
| 59. | precision ceramics |
| 精密陶瓷 |
|
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| | |
| 60. | precision limiter |
| 精密限幅器 |
|
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