| 摘要 |
<P>PROBLEM TO BE SOLVED: To detach a suction body 5 which is arranged at the front end of an extension joint pipe 4, by operating an operation means 8 arranged in a hand operation part 3. Ž<P>SOLUTION: A first operation rod 10a arranged in an external cylinder 4a, a second operation rod 10b arranged in an internal cylinder 4b, and a connection means 11, which connects/separates the first operation rod 10a to/from the second operation rod 10b and transmits the movement of the first operation rod 10a to the second operation rod 10b when the first operation rod 10a is operated, are disposed over the external cylinder 4a and the internal cylinder 4b of the extensible joint pipe 4. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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