单词：relief pressure valve
relief pressure valve的用法和样例：
例句
- No relief valve is required where two pressure reducing valves are installed.如果装上两个减压阀，就不需要安全阀。
- Look for any signs of leaking between the gun and the unloader valve.检查一下水枪和减压阀是否有泄漏的迹象。
- Remove the elbows from the relief valve base.从安全阀底座拆卸弯头。
- Never plug the discharge of a pressure safety relief valve!绝对不要堵塞压力安全阀的排泄口！
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