a one-way valve consisting of a ball that rests inside a cylindrical seating over a hole and rises and falls by means of a spring, its own weight, or pressure of gases or liquids
| 单词 | ball valve |
| 释义 | ball valvenouna one-way valve consisting of a ball that rests inside a cylindrical seating over a hole and rises and falls by means of a spring, its own weight, or pressure of gases or liquids |
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