FIELD: hydraulic excavation. SUBSTANCE: traction means is connected with working member which has vibrator with vibration generator and freezing header. Working member incorporates rods whose central holes are connected to vibrator and freezing header. The latter is connected by heat-insulated pipes and controllable valve with pump and coolant source. EFFECT: improved design. 1 dwg
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Authors
Dates
1994-12-15—Published
1990-10-16—Filed