在开启期间，阀杆与楔板的连接位于阀座表面支撑内。既降低重量，又增加稳固性。
Stem to wedge connection is inside the seating faces supporting the wedge ears during opening. More robust with less mass.
对于长阀杆的延长装置，需要提供适当的和坚固的支撑座。
Adequate and rigid support must be provided for long stem extension units.
对于长阀杆的延长装置，需要提供适当的和坚固的支撑座。
Adequate and rigid support must be provided for long stem extension units.
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