FIELD: power engineering. SUBSTANCE: invention can be used in servo pneumatic mechanisms and vacuum equipment. Proposed drive contains bellows made for connection with pressure building device. Parts of bellows at different sides of axial plane have different rigidly of corrugations. For this purpose said parts may have different thickness of wall or one of parts can be subjected to hardening, or said parts can be made of different material. EFFECT: reduced overall dimensions of drive. 4 cl, 2 dwg
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