| 摘要 |
<p>The machine delivers hardening material such as concrete from a hopper to a trough below, vibrated if necessary, leading to shuttering. Near the trough (4) is a device (6), operated as necessary, delivering in metered quantities a material at least temporarily affecting the characteristics of the concrete etc. This device can be situated near the trough lower edge (4") and preferably underneath it, so that it only affects the concrete already discharged over it. It can be in the form of a sprayer for water, oil, an emulsion, paint or other liquid.</p> |
