| 摘要 |
PROBLEM TO BE SOLVED: To provide an S-shaped expansion joint for sleeve tubes which can be used regardless of the height of a step and inserted smoothly when laying the sleeve tubes at a stepped part. SOLUTION: In this joint S-shaped as a whole, short tube parts of each of two bent tubes are connected to each other whose one end of the bent part is made as a connection port for the sleeve tubes and the other end as the short tube part, at the connection part, axes of the short tubes are coaxial and expandable along the axes. COPYRIGHT: (C)2003,JPO
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