| 摘要 |
A device capable of adhering to an object surface that is under a liquid level and moving along the surface. The device comprises two gas regions that bring the object surface into contact with only the gas, and the gas regions can be provided with a device that acts on the object surface. The device comprises a main casing at least comprising an outer casing and an inner casing, an outer seal member which is installed on an opening portion of the outer casing and part of which is brought into contact with the object surface, an inner seal member which is installed on an opening portion of the inner casing and part of which is brought into contact with the surface of the object, and means that keeps the distance between the main casing and the object surface to a desired distance and is capable of moving along the object surface. At least the outer casing, the outer seal member and the inner seal member cooperate with the object surface to define a first region, and at least the inner casing and the inner seal member with the object surface to define a second region.
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