a lift valve whose moving element somewhat resembles a mushroom in shape.
| 单词 | θ214295 | 
| 释义 | society > occupation and work > equipment > machine > parts of machines > control(s) > 			[noun]		 > valve > lift (2)		 mushroom valve1877 a lift valve whose moving element somewhat resembles a mushroom in shape. lift valve1887 a valve which opens by the valve head moving (vertically) out of its (horizontal) seat. | 
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