FIELD: construction. SUBSTANCE: member has ducts intersecting at acute angle. One of which is vertical and has larger diameter. Ducts are formed by making embedded solid part of two pipes monolithic. Lower ends of pipes are sealed and the upper ends are provided with removable plugs, and have bosses on their sides with holes for fastening reinforcing members. EFFECT: higher efficiency. 2 cl, 1 dwg
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Authors
Dates
1994-05-30—Published
1991-02-05—Filed