| 摘要 |
In a lower-side-columnar-conductor installing process, a first main columnar conductor (2), a second columnar sub-conductor (3), and a first main columnar conductor (1) are set up individually, and the first main columnar conductor (1) is disposed between the first main columnar conductor (2) and the second columnar sub-conductor (3). In a U-shaped-conductor fastening process, the upper-side end portion of the first columnar sub-conductor (2) is arranged facing one end of a U-shaped conductor (7) bent in a U-shape, the upper-side end portion of the second columnar sub-conductor (3) is arranged facing the other end of the U-shaped conductor (7), and the center portion of the U-shaped conductor (7) is fastened to the tip portion of a second main columnar conductor (4). |
