| 摘要 |
<p>1,253,316. Hopper craft. INDUSTRIEELE HANDELSCOMBINATIE HOLLAND N.V. 23 Oct., 1969 [1 Nov., 1968], No. 51943/69. Heading B7A. In a hopper craft having a central hopper 4 with air chambers 5, 6 on each side, branch pipes 9 load dredged material into the air chambers and pipes 18 discharge the material from them. In the embodiment of Fig. 3 overflow 11 of the central hopper and overflow 13 of air chamber 5 lead into pipe 14 which passes through the air chamber to the side of the craft.</p> |
