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| 舌型阀; 翻板式阀门 | |||
| 片状阀; 铰链阀 | |||
| 止回阀; 单流阀 | |||
| 瓣〔舌形〕阀 | |||
| 瓣阀 | |||
| 舌状阀 | |||
| 挡止回阀; 挡翻板阀; 挡瓣阀; 挡板阀 | |||
| flapper valve: 11 phrases in 6 subjects |
| Drilling | 1 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 5 |
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