| 摘要 |
A compass cutter comprises a main body fastened with an extension rod which is connected with a slidable seat slidable along the extension rod. The main body is further provided with a locating block, a protective cover, a blade, a fixation block, and an insertion pin. The slidable seat is provided with a locating block, a connection rod, a locating pin, and a shield. The compass cutter can be expanded, thanks to the extension rod. The locating pin and the blade are shield by the shield to protect the user of the compass cutter.
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