FIELD: mechanical engineering. SUBSTANCE: extruder has upper and lower endless belts passed through two guide drums mounted on rigid bed for rotation. Inner sides of the belts accommodate pressure chambers confined vertically and secured in bed. The belts are acted upon by pressure exerted by working fluids. Pressure chambers accommodate working elements having casing and adapted to contact with pressure fluid present in the pressure chamber. EFFECT: enhanced efficiency of the machine. 24 cl, 6 dwg
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