摘要 |
PURPOSE: A coupling expansion method of a rail is provided to prevent noise and sudden impact. CONSTITUTION: A coupling expansion method of a rail comprises first and second inclined surfaces(11, 21), a connection plate, and a coupling unit(5). The first and the second inclined surfaces are formed on the connection portion of first and second rails to form buffering space. The connection plate is attached to the both sides of the first and the second rails. The coupling unit couples the first and the second rails and a connection plate.
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