Boom and counter boom of the crane 2.13 Trolleys for the movement of the load m 1 and counterweight m2. The trolley shown in Fig. 13, consists of a chassis or metal base and four wheels which are to move into two rails. The rails that belong to the boom are longer than those of the counter boom.
Water easily passes though this EZ-Dry polyurethane foam. * Outdoor furniture such as seat and back cushions and mattresses. * Boat or marine cushions, golf carts, pool, patio or grading cushions. * Can also be used under Phifertex material and for filtering or padding whatever is exposed to large amounts of water.
Aylio Coccyx Orthopedic Comfort Foam Seat Cushion (Gray) Designed for orthopedic purposes, this is one of the most versatile seat cushions around. It can be used in the car, wheelchair, or office chair. Its value lies in that it allows you not only to seat comfortable for long periods of time but also helps you sit upright with proper posture.