FIELD: hydraulic engineering. SUBSTANCE: packet 5 formed by folding film 6 into two stacks beginning from opposite edges to the center is placed in trench 4 of bottom 2 of pit 1 of the channel. Then soil strips 7 are cut off. The strips are parallel to pit 1 axis. Film 6 is folded from packet 5 on the place, where the soil was cut off. Then film 6 is held down by soil 3 in the direction from pit 1 axis towards its sides 8. EFFECT: high technological effectiveness. 3 dwg
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