| 摘要 |
<p>The device comprises a container 6 for said material, and a shaft 17 rotatably mounted through a bore 14 in the bottom of said container 6 and supporting a screw conveyor 25, said shaft 17 comprising a threaded portion 20 cooperating with said bore 14 to define a helical channel 21 providing communication between funnel 9 and a valve controlled duct 23 leading to an outlet nozzle 2. <IMAGE></p> |
