| 1. | Reduced pressure detector assembly backflow preventer
减压检测器组合防回流装置
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| 2. | Blowout preventer and control system blowout preventer
防喷器及控制装置.防喷器
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| 3. | We do not use this valve to control the blowout preventer
我们不用这个凡尔控制防喷器
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| 4. | Adjust the hydril ( annular preventer ) pressure to 900 psi
环形防喷器压力调到900磅/英寸2 。
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| 5. | Blowout preventer of three stage packer type
三级密封式防喷器
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| 6. | Four required per backflow preventer
每个防回流阀需要四个。
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| 7. | Have the hydril [ annular preventer ] pressure - tested to 5 , 000psi
海德里环形防喷器试压5000磅/英寸2 。
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| 8. | Laboratory faucet backflow preventer
实验室旋塞防回流装置
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| 9. | For use with backflow preventer test cocks to protect from damage
用于防回流阀测试旋塞，防止受到破坏。
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| 10. | Installing a backflow preventer in a pit or vault is not recommended
不建议在坑内或拱顶内安装防回流阀。
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