Another important aspect in the manufacture of these valves is the clearances at the critical metal interfaces (wedge/body guides, stem/back seat bushing, etc.).

• 这种阀门的制造中的另一个重要方面是关键金属表面(楔形闸板/阀体导向，阀杆/后阀座衬套，等等)的之间的间隙。