| 摘要 |
<p>1,157,431. Drainage systems. P. N. H. SCARFE. 8 June, 1966 [9 June, 1965; 26 July, 1965], Nos. 24462/65 and 31836/65. Heading E1C. In a drainage. system, sewage or surface water passes through one or more access pits 10, 18 en route to the main sewer. Each pit of part spherical form has an outlet 30 at the bottom and holes are formed where required to receive flanged connector members 31 for inlet pipes 12, 13, the flanges 33 being curved to conform with the pit surface. In a modification, the outlet includes a right-angled bend.</p> |
