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| 71. | pit-alert sensor |
| 泥浆池液面报警传感器 |
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| 72. | reception pit [manure] |
| 集粪池 |
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| | |
| 73. | recuperative soaking pit |
| 换热式均热炉 |
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| 74. | pit protection grid |
| 底坑护栅 |
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| 75. | apple bitter pit |
| 苹果苦陷病 |
|
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| 76. | pit silo unloader |
| 青贮窖卸载机 |
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| 77. | piciform pit pair |
| 云杉型纹孔对 |
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| | |
| 78. | pit alert system |
| 液位报警系统 |
|
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| 79. | pit bottom stoop |
| 井筒安全柱 |
|
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| 80. | pump suction pit |
| 泵上水池 |
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