FIELD: hydraulic connection units used for connection of two members for transportation of liquid. SUBSTANCE: each connection member is provided with ball lock. Joint includes also first and second swivel ball locks located in open ends of first and second liquid transportation members, respectively. Joint has coupling device for keeping first and second liquid transportation members in connected state and disconnecting device used for selective disconnection of first and second liquid transportation members only when first and second ball locks are in closed position. EFFECT: enhanced tightness of joint. 18 cl, 10 dwg
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