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| 孔式流量计; 节流环式流量计 | |||
| 测流量水孔 | |||
| 膜片计量表 | |||
| 节流式流量计; 定量油孔 | |||
| 孔流量计 | |||
| 量水孔 | |||
| 锐孔流量〔速〕计; 孔板 〔孔口〕流量计; 测流〔量水〕孔 | |||
| 锐孔流量计; 锐孔流速计; 孔板流量计 | |||
| 孔板流量计 (节流式流量计) | |||
| 孔口流量计; 管孔流量计; 管孔流差计; 测流孔 | |||
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| 孔板流量计 | |||
| orifice meter: 21 phrases in 5 subjects |
| Drilling | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 6 |
| Oil processing plants | 1 |
| Technology | 12 |
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