FIELD: machine building.
SUBSTANCE: invention relates to railway transport, particularly, to bogie bolster beams. Bolster comprises upper and lower belts, side walls and inner ribs. Ribs are located between upper and lower belts. In the central part of the ribs there are two openings separated by bridges. In central part of side walls there is one window.
EFFECT: reduced metal consumption of the bolster.
4 cl, 2 dwg
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