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| 单向球阀 | |||
| 球形单向活门 | |||
| 球式单向阀 | |||
| 球形节流阀 | |||
| 止回球阀; 钢球止回阀; 球形单向阀; 球形止回阀 | |||
| 球型止回阀 | |||
| 球式止逆阀 | |||
| 逆止球阀; 钢球单向阀; 球止回阀; 球形逆止阀 | |||
| ball check valve: 14 phrases in 4 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Chemistry | 1 |
| Technology | 10 |
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