| 摘要 |
<p>The sprayer for plaster has a monobloc hopper of light alloy, with openings for the projected mortar in the front face and compressed air jets in the rear face. The jets are connected to a pipe with an external socket. A component, of hardness greater than the alloy, is embedded in the lower part of the hopper, and distributes compressed air to the nozzles, at the same time improving hopper rigidity. The component can be a metal tube, preferably of steel, extending across the base of the hopper.</p> |
