| 摘要 |
<p>1,193,525. Moulding concrete beams. SOC. DES GRANDS TRAVAUX DE MARSEILLE S.A., and SOC. D'ETUDES DE L'AEROTRAIN S.A. 19 Dec., 1967 [20 Dec., 1966], No. 57503/67. Heading B5A. Straight, curved or screwed concrete beams 3 are cast about assemblies 1, 2 of arch-shaped elements mounted end to end on supports 7 provided with adjustment devices, e.g. screws, whereby each element is adjustable vertically, laterally and longitudinally. After adjusting the elements, any gaps between end faces thereof are filled with mortar &c.</p> |
