- sprinkler test valve
- 喷水: dabble; water spray; water j ...
- 灭火系统: fire extinguisher system
- 测试: test; testing; checkout; mea ...
- 阀: established house or power g ...
- 喷水灭火系统: fire-sprinkling system; sprinker system; sprinkler system; water fire extinguishing system; water spray fire extinguishing system; water-jet quench system
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