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Press down pop-up to close drainage. lift.
落水头压下，排杆关闭，面盆储水。
youdao
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The development of the caves is in close connection with underground drainage network;
研究区洞群洞腔发育受区域构造裂隙的控制，与地下水文网的关系密切；
youdao
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The development of the caves is in close connection with underground drainage network;
研究区洞群洞腔发育受区域构造裂隙的控制，与地下水文网的关系密切；
youdao