| 摘要 |
771,228. Step-by-step conveyers. SMIDTH & CO. AKTIESELSKAB, F. L. Nov. 1, 1955, No. 31241/55. Class 78 (1). In a conveyer of the kind described in Specification 642,426 each conveyer member 1 has a ridge 5 at its leading end. The angles C, D, which the front and rear faces of the ridge make with the base, are between seventy and ninety degrees, and thirty and sixty degrees, respectively. |
