needle plug valve 针阀 ; 针状阀
The tapered plug or "needle" is screwed in or out of a mating orifice in the body and thus controls the effective orifice size.
其锥形插头或“针头”是阀体上配置的螺纹旋进旋出的节流道，因此能够有效控制节流面积。
Methods Bacterial cultures were made on venipuncture needle, the puncture needle head of liquid bottle and the open site of rubber plug in intravenous transfusion.
方法对输液过程中液体瓶塞开启处、输液管瓶端针头和静脉穿刺针分别进行细菌培养。
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