,、。,(Check Valve),。、、。
、
,。,,,;,,。、。
,
1. (Swing Check Valve),,,,。
2. (Ball Check Valve),,,;,,。
3. (Lift Check Valve),,。
4. (Non-return Valve),,。
- ,,。
。,、,。,,。
、,。、。
,。,,。,,。,,,。
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