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.
Memory foam. Memory foam consists mainly of polyurethane as well as additional chemicals increasing its viscosity and density. It is often referred to as viscoelastic polyurethane foam, or low-resilience polyurethane foam (LRPu). Higher-density memory foam softens in reaction to body heat, allowing it to mold to a warm body in a few minutes.