| 摘要 |
The present invention relates to a hybrid shaft and a pipe manufactured by laminating the combination of wood and complex material on the middle floor seen the cross section of a shaft or a pipe to minimize the weight of the shaft or pipe, reduce production costs, and at the same time maintain strength. To realize the same, the hybrid shaft and pipe according to the present invention, in order to reduce weight of various shafts, rollers, or pipes while still maintaining the strength, the external surface material is replaced by a metal layer or a complex material layer having minimum thickness, and a wood material layer is arranged on the middle layer, while arranging the complex material layer on the outside. |
