试题与答案

铲刀在使用时，应检查是否有锈迹，如有锈迹，则不能使用，以免刮花建筑物（）。刀片应锋利

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题型：填空题

题目：

铲刀在使用时，应检查是否有锈迹，如有锈迹，则不能使用，以免刮花建筑物（）。刀片应锋利，刀口如钝了，另换新刀片使用。铲除污垢后，刀片与被清洁的表面夹角应小于（），夹角越大，损坏硬表面的可能性就越大。

答案：

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