| 摘要 |
PROBLEM TO BE SOLVED: To efficiently lay each rail when the main rail is laid at a high place at a center and the sub-rails at left-right low places. SOLUTION: In a rail base, the main rail is placed at the high place at the center and the sub-rails at the left-right low places in the rail base, pockets in which each rail can be placed in base bodies laid on a ground or in fixed height on the ground are formed in the rail base, and each rail is secured in the pockets.
|
