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| 1. | Some styles are spring-actuated for immediate closure when flow stops. |
| 有些类型止回阀配置弹簧驱动,能够在流动停止时,立即关闭阀门。 |
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| 2. | rapid-closure damper |
| 快速关闭阀门 |
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| 3. | Valve Disadvantages: The valve is difficult to close and requires the operator to double close the valve. |
| 阀门的缺点：阀门难以关闭，要求操作者二次关闭阀门。 |
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| 4. | "Before installation, check line of flow through valve so that valve will function properly. Close valve completely before installation." |
| 安装前要完全关闭阀门。 |
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| 5. | Quick closing valves, water hammer or supply pressure fluctuations can cause intermittent discharge. |
| 迅速关闭阀门，水锤或供应压力波动可能导致间歇性排放。 |
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| 6. | When finished with a cylinder, always close the valve. When work is to be interrupted for any length of time, the valve should be closed and all gas released from the hose and regulator to a safe location. |
| 钢瓶使用完毕，总是要关闭阀门。当工作被打断任何长时间时，必须关闭阀门，把软管和调整器内的所有气体排放到安全的地方。 |
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| 7. | When returning empty cylinders, close the valve before shipment. Leave some positive pressure in the cylinder. |
| 返还空瓶时，在运输之前关闭阀门，使钢瓶内部保持正压。 |
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| 8. | Inflate the Therm-a-Rest mattress by mouth as hard as possible, then quickly close the valve. |
| 用嘴吹气垫使之尽可能膨胀到最坚硬,然后立即关闭阀门. |
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| 9. | If dripping continues, close the valve more tightly in small increments until dripping ceases. |
| 如果滴水仍然继续，则稍微更紧的关闭阀门直到滴漏停止。 |
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| 10. | "all square operating nuts have a standard 2"square which facilitates opening and closing the valve with a square socket wrench as used by the Water Works." |
| 所有四角操作螺母都是标准2平方英寸,便于在供水系统中,使用正方形长套筒扳手开启或关闭阀门。 |
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