| 摘要 |
Apparatus for cleaning underwater surfaces and including at least one rotatable brush, and at least one pump the generating a stream of water passing from the front to the rear of the brush to hold the apparatus against an object to be cleaned. The apparatus can be readily manipulated and held in any desired attitude as a result of the brush being surrounded by an annular tube containing two immiscible materials of different specific gravity, such as a solid and a liquid, or two immiscible liquids. |
