FIELD: transport, mining, building and other industries.
SUBSTANCE: invention can be used also for closing slots in freight cars. Proposed stopper is formed of wetted paper production wastes in form of wedge of triangular prism outline being isosceles triangle in solid section at ratio of base to side of 1 - 1.2 - 1.5. Stopper can be made with different length and type size.
EFFECT: facilitated closing of slots, improved reliability.
1 dwg
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