| 摘要 |
Chain saw for cutting branches of up to 200 mm in diameter and above, comprising a main body, a self priming pump, a joint, a positioning washer, a collar bracket, an oil sump, hook supports and a blade. It falls within the technical field of human requirements and within the application field of instrument and tool manufacturing. It will cut branches within arm's reach and if a telescopic extension is fitted it will cut branches at any desired height. It is more easily operated than previous solutions and as a result of the ease with which the parts may be replaced it is easily maintained and therefore very reliable.
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