Set in the days of trench fighting rain syphonic tablets should be connected with connecting material film material should be determined in accordance with Gutter.
设置于天沟内的虹吸式雨水斗应带连接片，连接片材质应根据天沟材质确定。
Set in the days of trench fighting rain syphonic tablets should be connected with connecting material film material should be determined in accordance with Gutter.
设置于天沟内的虹吸式雨水斗应带连接片，连接片材质应根据天沟材质确定。
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