| 摘要 |
<p>The pump projects concrete and mortar for any type of building, with variable delivery rates. The different rates are obtained by varying the flow of hydraulic driving oil. Change from pumping to projection is via a reversing valve.S The pumping system has an inlet/exhaust feed with a pivoting pipe on a vertical axis. This pipe is mounted on a movable frame which can take up play by wear. Stopping the opening across which the pipe penetrates in the hopper is via a flexible bellows.</p> |
