压力模铸 compression moulding
- 阀座应该是弹性密封,它使得阀座处于较低的排出压力下,箭头应该永久性清晰可见地模铸在阀体上,标明计划的流向。
The valve seat shall be an elastomeric seal that will permit seating at low-head pressure, and an arrow shall be molded on the valve body for permanent visibility to indicate the intended direction of flow.
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