Optional disc configuration which provides line contact between spherical disc and conical body seat.
Optional disc configuration which provides line contact between spherical disc and conical body seat.
备选阀瓣结构，在球形阀瓣和锥体阀座之间具有线接触作用。
Optional disc configuration which provides line contact between spherical disc and conical body seat.
备选阀瓣结构，在球形阀瓣和锥体阀座之间具有线接触作用。