| 摘要 |
498,506. Making leather. FRAMBS & FREUDENBERG. April 5, 1937, No. 9600. Void. Convention date, April 4, 1936. [Class 76] Hides &c. while being tanned or dressed are subjected to rapid vibrations of small amplitude imparted to the container in which they are being treated. The container may at the same time be rotated. Solids such as grinding balls may be present in the container. |
