| 摘要 |
The working tool (30) is designed to rotate around its own vertical axis (x-x') and consists of an active working part (30b), a linking section (30a), which is roughly orthogonal to the active part and is designed to secure the tool to the machine. The linking section is provided with an opening (34) to allow the tool to be held in place and a tongue (33) and a finger (35), which fit into housings (6), located on the machine. The cross section, of the linking part of the tool, taken at right angles to the longitudinal axis of the tongue and passing through the tongue, presents a first part, which is roughly rectangular. It also presents a second part, or parts, which have increased thickness relative to the first part and have a shape, which is at least partially rounded, or circular, with the first part forming the tongue and second part the finger.
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