| 摘要 |
1494028 Weighted pipe PELT & HOOYKAAS BV 4 March 1975 [6 March 1974] 8864/75 Heading F2P [Also in Division B2] A hollow body, e.g. a pipe or container, is provided on its outer surface with a weighting layer consisting of an hydraulically bound aggregate of particulate metallurgical slag, preferably a steel refining slag. Cement or unslaked lime may be incorporated into the aggregate. |
