| 摘要 |
Mechanical belting having transverse rigidity provided by spaced apart transversely extending layers, one of these layers is of compression-resisting material and the other of tension-resisting material, the spaced apart layers giving a beam effect. The layer of tension-resisting material is of troughed shape in a transverse cross section. By this means, the centers of the layers are spaced further apart than their lateral edges, giving an increased resistance to troughing of the belt.
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