您要查找的是不是：
- line check valve 中间止回阀
- in line check valve 进油单向阀
- A shutoff and check valve must be installed in the water supply line “G”. 在供水管道“G”的位置必须安装一个关断阀和一个止回阀。
- Check valve guiding shall be plastic to plastic. 止回阀引导装置应该是塑料对塑料。
- Globe Stop Check Valves Product Line. 球形截止止回阀产品系列。
- Remove check valve and valve seal from booster. 从倍力器上卸去逆止阀和阀门密封。
- Swing Check Valves Product Line. 旋启式止回阀产品系列。
- Connect vacuum hose to booster check valve. 连接真空软管到增压器检测阀。
- Tilting Disc Check Valves Product Line. 翻转式阀瓣止回阀产品系列。
- To test for tightness of second check Valve. 检测第二止回阀的密封性。
- ANSI FLANGED SWING CHECK VALVE CLAS. 美标法兰止回阀。
- Reassemble the Check valve modules. 重新组装止回阀模块。
- Connect vacuum hose to booster check valve . 连接真空软管到增压器检测阀。
- Purpose: To test check valve No. 1 for tightness. 目的:检测止回阀1号的密封性。
- Sticky outlet check valve poppet. 1检查过滤的进水管线。
- CAUTION: The check valve spring is in compression. 警告：止回阀弹簧处于压缩状态。
- Controlled closing of the valve, opens the mainline check valve, gradually increasing line pressure. 阀门受到控制的关闭操作，开启主管线止回阀，逐渐增加管线压力。
- Remove the four screws holding the first check valve cover. 拆卸固定第一止回阀阀盖的四个螺丝。
- If you want to show the date when the signature is added in the signature line, select the Show sign date in signature line check box. 如果希望显示向签名行添加签名的日期,则请选中“在签名行中显示签署日期”复选框。
- A check valve may be required ahead of the backflow preventer. 此时在防回流阀前面可能需要安装一个止回阀。
