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| 膜片式马达 | |||
| 隔膜电动机 | |||
| 膜片阀控制电动机; 光阑驱动电 | |||
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| 光阑〔隔膜，膜片阀〕驱动电动机 | |||
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diaphragm- motor : 1 phrase in 1 subject |
| Oil / petroleum | 1 |
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