| 摘要 |
799,217. Batteries. AKTIEBOLAGET TUDOR. Nov. 21, 1956 [Nov. 24, 1955], No. 35603/56. Class 53. A vent plug 1 for an accumulator contains crushed microporous material 6 which prevents drops of liquid escaping with the gases. The material 6 can be, for example, microporous rubber, polyvinyl chloride, polyethylene or paper impregnated with synthetic resin and may be waste material from separator manufacture. The material may be impregnated with wetting agent. |
