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![Ball valve - Wikipedia, the free encyclopedia](https://www.iarticlesnet.com/pub/img/site/s_39.jpeg)
Ball valve - Wikipedia, the free encyclopedia
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日期:2024-08-22
A ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. The sphere has a hole, or port, through the middle so that ......看更多