Wiring a 2 layer wind pipe, length 5 m, for bringing gas into the air to drill, drill, pneumatic rotation. Rack for cooling air, away from the area of the surgery.
Cable ducting a second layer of 5 m long. Lingerie for bringing gas into the air drill to drill a whirlwind. Outer layer for ventilation to keep away from the area of the surgery.
Late air duct, a kind of 2 I long for the inner 5 m. gas into air drill to drill the whirlwind. Outer layer for ventilation away from the area of operation.