FIELD: hydraulic cylinders for displacing working organ from one position to another. SUBSTANCE: hydraulic cylinder includes housing with coupled piston and rod. Housing has cylindrical end collar for passing rod outside at one side of housing. Part of rod contacting with cylindrical end collar is in the form of cylindrical necking portion spaced from piston by distance providing necessary stroke value of hydraulic cylinder. EFFECT: protection of rod surface against products obtained at interaction with sea medium at exploitation. 4 cl, 2 dwg
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