压力容器进行液压试验时,容器要充满液体,排净空气,待容器壁温度与液体温度相同时,才能缓慢升压到规定压力,根据容器大小保持10~30min,然后将压力降到设计压力至少保持()min。
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The firing of a red star signal may mean().
A. This is the best place to land
B. You are seen - assistance will be given as soon as possible
C. Tail block is made fast
D. Slack away
就毛泽东同志的一生来看,他的功绩远远大于他的过失。
A. 正确
B. 错误