Tank and cover shall be shaped so as to prevent stagnation of water externally, and gas pocket internally which could trap escaping gas and thereby impede operation of the gas detector relay.
坦克和覆盖应形，以防止外部滞水，气体口袋内部可以捕获逃逸气体，从而妨碍气体探测器继电器的操作。
Tank and cover shall be shaped so as to prevent stagnation of water externally, and gas pocket internally which could trap escaping gas and thereby impede operation of the gas detector relay.
坦克和覆盖应形，以防止外部滞水，气体口袋内部可以捕获逃逸气体，从而妨碍气体探测器继电器的操作。
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