| 摘要 |
<p>The structure (1) has a rectangular frame (2) with rear and front wheels (3a, 3b) for positioning operator knee on the frame, and a ergonomic section (4) with a part (4a) and an S-shaped curved part (4b) having a comfort/dampen coating e.g. foam, for chest support. The frame has levers (14) to adopt a rest position in which an operator does not influence on rolling of the structure and a locking position in which the levers temporarily tilt to support on ground and lift the rear wheels to prevent rolling of the structure and secure stability of structure to perform laying operations of tile.</p> |
