| 摘要 |
1,217,040. Underpinning. HOLLANDSCHE DRAAD-EN KABELFABRIEK N.V. 2 April, 1968 [3 April, 1967], No. 15802/68. Heading E1E. [Also in Divisions F2 and H5] A plate or block 1 of polyvinyl chloride for underpinning a wall element is provided with a heating coil 3, 4 whereby it can be made to yield and allow the wall element to settle on the substrate. The plate is provided with parallel ribs 2 as shown and the heating coil may be embedded therein or located on an outer surface thereof. A series of such units may serve to position a machine on an uneven floor. |
