| 摘要 |
It comprises a substantially U-shaped pipe member (9) having a horizontal base (9c) and a pair of vertical legs (9b) extending upwardly from the horizontal base and terminating at a pair of upper ends (9a), a transverse member (14) having a first horizontal portion (10) welded at the opposite ends to the upper ends (9a) of the pipe member (9), a first vertical portion (11) depending from the first horizontal portion (10) to extend along one side of the pipe member (9) and having a lower end continuing to a second horizontal portion (12) lying beneath the first horizontal portion (10) between the vertical legs (9b) of the pipe member (9), and a second vertical portion (13) depending from the second horizontal portion (12) along the other side of the pipe member (9), each of the first and second vertical portions (11, 13) having opposite edge portions (11a, 13a) welded to the legs (9b) of the pipe member (9), the first horizontal portion (10) having a pair of transversely spaced holes (15, 15a), the second horizontal portion (12) having a pair of holes (16, 16a) which are respectively aligned in vertical direction with the holes (15, 15a) in the first horizontal portion (10) for receiving headrest receptacles. |
