| 摘要 |
789,453. Batteries. ALKALINE BATTERIES, Ltd. Dec. 12, 1955 [Jan. 28, 1955], No. 2596/55. Class 53. A vent plug a for an accumulator has an orifice b which diverges from top to bottom of the plug and whose axis is at such an angle that no imaginary line parallel to the vertical axis of the plug passes through the top and bottom ends of the orifice. A slidable cover may be fitted over the upper part of the orifice and a rubber plug g may be fitted during transit. |
