... Air to second stage （输送空气往二级头） Valve balance spring （阀门平衡弹簧） Intermediate chamber （中压舱） ...
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The time which the valve core takes by reaching the balance position and the maximum position will reduce linearly when the spring stiffness coefficient increase;
弹簧劲度系数与阀芯达到的最大位移、平衡位置位移呈线性递减关系；
The quick trunk injector comprises a reservoir pressure-meter, a spring balance, a transfusion pipe, a liquid valve, an air pinhead and a switch.
快速树干注射器主要由贮液瓶、压力表、弹簧秤、输液管、注药口、气门嘴、注射针头、开关等几部分组成。
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