... 急回冲程 quick return stroke 急回阀 quick return valve 流砂 quick sand ...
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... 速断开关 quick break switch 速回阀 quick return valve 速动三通阀 quick triple valve ...
The quick-opening valve is better provided with an automatic return spring so as to close the valve after being released.
快开阀门上最好自带一个自动回位 弹簧，松手即刻关闭。
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