A valve that was supposed to be open, to allow the heat and steam to escape, was closed.
一个本应打开的阀门被关上了，这个阀门控制着热量和蒸汽的泻出。
The engineer opened the safety valve to allow the steam to escape and so reduce the pressure.
工程师打开安全阀让蒸气外逸以便降低压力。
The engineer opened the safety valve to allow the steam to escape and so reduce the pressure.
手轮、手柄和扳手传动以及安全阀、减压阀、疏水阀省略本代号。
The engineer opened the safety valve to allow the steam to escape and so reduce the pressure.
手轮、手柄和扳手传动以及安全阀、减压阀、疏水阀省略本代号。
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