| 摘要 |
FIELD: devices for placering of river-bed diamond-bearing placers. SUBSTANCE: device has scraper, one head and two tail ropes, three-drum winch, snatch blocks, unloading platform with grate, rigid inclined stage installed in zone of exit of loaded scraper to river bank and adjacent to unloading platform located on river bank. Head rope is made of two coupled sections, with breaking load of rope section adjacent to scraper is selected by calculation. EFFECT: reduced cost of device and expenditures for its operation. 4 cl, 3 dwg
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