| 摘要 |
The present invention concerns a plug closing the holes in the top wall of gel-electrolyte-type electrical batteries, wherein a check valve capable of ensuring a steady depression inside the battery is provided. According to the invention, said valve (6) is manufactured in a preassembled valve body formed as a body separate from the plug and steadily anchored within a respective housing in the plug. The invention further concerns a preassembled valve body comprising a supporting body (1), wherein said resting seat for the check valve (6) is formed, a valve retaining cover (2) being associated with said supporting seat in a correctly-calibrated operating position. |
