The design concept of the automatic security shutoff is a hinged door closing onto a knife-edged seat fully contained in a high-grade ductile iron body (or steel casting).
The design concept of the automatic security shutoff is a hinged door closing onto a knife-edged seat fully contained in a high-grade ductile iron body (or steel casting).
自动安全关断的设计原理是由内置于高品质延性铸铁﹝或铸钢﹞阀体，以铰闩的阀门闭锁在一具有刃缘的阀座上。