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METHOD OF WORKING SOIL IN CANAL CONSTRUCTION
METHOD OF WORKING SOIL IN CANAL CONSTRUCTION
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机译:渠道施工中的土壤处理方法
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1.method of soil in строрггельстве channels, включакнций development main grooves грунтозаборным устройс your.moving in the horizontal and vertical плоскост х through winding ropes on the drum папильр
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