Requirements: Valve must be tight against reverse flow under all pressure differentials.
要求：在所有压差下，阀门对于回流必须是密封的。
One of the requirements for this job is the ability to work under pressure.
这份工作的必要条件之一就是要有抗压的能力。
Then during the reaction pressure on container design requirements are not the same.
随之反应过程中的压力要求对容器的设计要求也不尽相同。
Then during the reaction pressure on container design requirements are not the same.
随之反应过程中的压力要求对容器的设计要求也不尽相同。
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