needle valve
英
美
- n.针形阀；针状活门
双语例句
- All needle valves must be closed on test kit.
检测组件上的所有针形阀必须关闭。 - 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。
用作名词 (n.)
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