| 摘要 |
PCT No. PCT/SE79/00034 Sec. 371 Date Oct. 22, 1979 Sec. 102(e) Date Oct. 22, 1979 PCT Filed Feb. 16, 1979 PCT Pub. No. WO79/00642 PCT Pub. Date Jun. 9, 1979. An air controlling device for use in a dryer for compressed air comprises dual containers of water absorbing, air permeable material arranged in parallel, each of the dual containers being alternately selected to dry compressed air and to be purged, two separate valve members, actuated by impulses of power, changing the connections between alternate containers. |
