| 摘要 |
This disclosure teaches a device for treating a ferrous surface and contemplates such applications as painting or scrubbing a ship's hull. Preferably, one or more rollers are engaged to the ferrous surface by magnets which are connected to the rollers within the width thereof by means of spring members. Thus engaged, the rollers are easily moved over the surface. Suitable paint applying devices or scrubbing brushes with drives are furnished on the rollers.
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