safety relief meaning in English

安全减压

Safety relief valves for anhydrous ammonia and lp - gas
无水液体石油气用安全卸荷阀门
Valves for anhydrous ammonia and lp - gas other than safety relief
无水液氨和液化石油气阀门
Safety relief valves shall be labeled for relief pressure rating
安全减压阀要有标示，标明压力释放级别。
Standard for safety for safety relief valves for anhydrous ammonia and lp - gas
无水氨气和液化石油气的安全阀的安全标准
Standard for safety for valves for anhydrous ammonia and lp - gas other than safety relief
无水氨和液化气阀门的安全标准安全阀除外

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