| 摘要 |
847,523. Fractionating columns. MARSTON EXCELSIOR Ltd. March 14, 1958 [March 11, 1957], No. 7996/57. Class 55 (2). The fractionating columns described in Specification 783,186 are modified by upwardly bending to marginal edge portions of the corrugated partitions such as 13 as shown at 18 to form end walls for the liquid collecting troughs 17. Specification 759,176 also is referred to. |
