| 摘要 |
PCT No. PCT/NL94/00109 Sec. 371 Date Feb. 20, 1996 Sec. 102(e) Date Feb. 20, 1996 PCT Filed May 11, 1994 PCT Pub. No. WO94/27071 PCT Pub. Date Nov. 24, 1994A safety valve having a valve body movable toward and from a valve seat with a spring bearing against a spring seat and pressing the valve body against the valve seat has a rotary knob on the housing having a portion engaging a boss on the valve body to slide the valve body away from the valve seat upon rotation of the knob. |
