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glass sheets, nails, etc.
27.
Before operation, move away the fragile things (glass, light
and etc.) and other things (long hair, plastic bag, rope,
wire and etc.) possibly entangle brushes.
28.
Do not sit on the machine or put heavy things on it.
29.
Clean the machine regularly. Empty the dust box.
30.
Recycle the battery when machine becomes broken.
