FIELD: mechanical engineering; lifting and transporting mechanisms. SUBSTANCE: jack has plates 6 and plate moving apart mechanism with lead screw 1 which has different thread sections. Jack has also levers 5 hinge-connected with nuts 2 and 3. Nuts 3 are arranged on section with one hand of thread helix, and nut 2, on section with other hand of thread helix. EFFECT: enlarged operating capabilities. 1 dwg
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