| 摘要 |
<p>AIR-OPERATED VALVEThe present invention is directed to provide an air-operated valve suitable for use in a form using a one-touch joint. A casing 4 is made by an upper casing 22 and a lower casing 21 which are screwed in each other. Piston driving means 12 has a one-touch joint 15 attached to a top part of the upper casing 22.Figure 1</p> |
