FIELD: hoisting pneumatic devices, applicable in production of elastic jacks, long-sized marine jacks inclusive. SUBSTANCE: two blanks of chamber parts are produced in the form of caps by autoclave extrusion on detachable mandrels. The edge of one cap is twice bent under with formation of U-shaped profile. The edge of the other cap is strengthened on it by metal rings and cemented in overlap. After cementation the cemented seam is fused by applying pressure inside the chamber. EFFECT: reduced production and operating stresses, enhanced sealing. 2 dwg
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