A boat hoist including a four-post rectangular frame structure having a pair of rails connected between pairs of posts in a parallel manner, a hydraulic piston and cylinder unit mounted within one rail and operationally connected to a level lift pulley and cable suspension system interconnected between the frame and a vertically movable platform mounted on the frame, the piston and cylinder unit provided with either a switch or a valve to prevent accidental lowering of the platform.

 
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> Small watercraft having an improved structure of storage compartment

> Device for connecting a submerged fluid-transporting line

~ 00069