| 摘要 |
A bottle mouth top surface polishing apparatus including rotating machine having a rotary shaft, a rotary plate means coupled at its center to the rotary shaft, a grinding plate fixed to the rotary plate and having a grinding face which is to be made in contact with a bottle mouth top surface to be polished, and a contact adjusting device for making the contact between the grinding face and the bottle mouth top surface always close over whole contact surfaces thereof upon polishing.
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