| 摘要 |
589,732. Toothed gearing, SPENCE, W. L. March 29, 1945, No. 7927. Addition to 557,471. [Class 80 (i)] An improvement or modification of the invention in the parent Specification consists in staying the upper part of the bridge member c to the end or side walls of the casing a by means of arm s integral with or secured to the member c, the cover b being secured independently to the casing.
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