needle valve

• n. 针形阀；针状活门

例句

用作名词 (n.)

1. All needle valves must be closed on test kit.
   检测组件上的所有针形阀必须关闭。
2. Needle valves are small sizes of globe valves fitted with a tapered plug.
   针形阀是配置锥形插式接头的小型截止阀。