| 摘要 |
The device has a beam (16) with an aluminum section that is provided with a guiding groove, which is longitudinally oriented with respect to the beam and transversely oriented with respect to an advanced direction (F) of the device. Motor trains (18D, 18G) are co-operated with a formwork scale (10), where one train is fixed and another train is adjusted with respect to the beam. The trains include rollers (28D, 28G, 30G) supported on the formwork scale. A polishing head (20) includes a chassis (36) suspended on the beam, and driven by an engine (38) and a pinion or rack assembly (40). |
