[kharakterizuyushcha] [s] : - by trapeziform form; - by presence of four longitudinal shelves with the air intake space between them; - by the presence on to center the revetments of bed with the trade mark; - by the execution of shelves by those by slightly bend out; [otlichayushcha] [s] : - by the arrangement of bed on two average regiments; - by the fulfillment of bed with the trade mark oval, hollow, with the edging on the edge; - by the execution of the external longitudinal ends of the shelves in the form of [vyt] [nutykh] so on of [mougolnikov] with the rounded off edges.