The hollow member (3) has an opening (32) which allows the transfer of the puncture needle (41) when the puncture needle (41) is transferred in the puncture direction (N1).
中空部件（3）具有开口部（32），该开口部用于在使穿刺针（41）沿穿刺方向（N1）移动时允许穿刺针（41）的移动。
Points function can divide into a needle shape can transfer throttle, Tube of shape can transfer throttle.
按功能可分为针形可调节流阀、筒形可调节流阀。
Points function can divide into a needle shape can transfer throttle, Tube of shape can transfer throttle.
按功能可分为针形可调节流阀、筒形可调节流阀。
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