| 摘要 |
1,033,356. Flexible tubes. WHITE DENTAL MANUFACTURING CO. (G.B.) Ltd. S. S. April 14, 1965 [April 17, 1964], No. 15970/64. Heading F2P. A casing for a flexible power transmission shaft has an inner tube consisting of at least two metal wires 1, 2 of complementary interengaging cross-sectional shape and helically wound in smoothly overlapping convolutions so that the tube has a helically grooved but otherwise smooth bore, an intermediate helically wound stranded wire layer 3, and a protective sheath 4 of polyvinyl chloride. |
