| 摘要 |
<p>Shuttle reciprocates linearly along a guide and is driven pneumatically by gas impulses, which are fed alternately against the shuttle ends at the ends of the traverse strokes, so that each impulse is timed to move the shuttle in another stroke in the opposite direction. Pref. a pair of single control valves are used. The shuttle hits on operating member at the end of each stroke.</p> |
