Abstract: A method for fabricating the three-dimensional comb-tooth-shaped groove array surface, the surface of the bearing is first etched with grooves having a certain depth by means of femtosecond lase, then a PTFE film is impressed and attached to the surface of the inner ring of the bearing, the position of a laser focus is adjusted to focus on the lower surface of the PTFE film, the same pit is scanned repeatedly, ripple characteristic stripes occur on the surface of the inner ring of the bearing while the film gasifies instantly under the action of laser ablation heating, a part of polymer material in the gasified part is adsorbed to a mechanical surface in each pit under the action of mechanical interlocking, and a super-oleophobic PTFE surface is obtained in each groove.

Abstract: A bedside lamp structure contains: a bed frame and two rotary arms. The bed frame includes a support rack, and the support rack has two threaded posts erected on two sides thereof individually. The two rotary arms are connected with the support rack, and each of the two rotary arms has a threaded orifice defined on a first end thereof so as to screw with each of the two threaded posts, and each rotary arm has a light emitting element mounted on a second end thereof. In use, each rotary arm is adjustably rotated to a desired angle. Each rotary arm is rotatably retracted back to an original position of the support rack, as not using the light emitting element. Thereby, the bedside lamp structure is simplified, operated easily, and used conveniently.

Abstract: A rack assembly includes a framework, and a foldable shelf mounted on the framework. The foldable shelf includes a support plate attached to the framework, an adjustable panel pivotally connected with the support plate, and a plurality of support legs pivotally mounted on the adjustable panel. Thus, the foldable shelf is expanded outward for use with a user and is folded when not in use. In addition, the foldable shelf can be folded when not in use so as to reduce the whole volume of the rack assembly, thereby decreasing the cost in packaging, transportation and storage of the rack assembly.

Abstract: A rack assembly includes a framework, and a foldable shelf mounted on the framework. The foldable shelf includes a main body provided with two support posts, an adjustable panel having two opposite ends each pivotally connected with a respective one of the support posts by one of two first pivot members, and two connecting plates each having an upper end pivotally connected with a respective one of the opposite ends of the adjustable panel by one of two second pivot members and having a mediate portion a lower end formed with a sliding slot pivotally connected with a respective one of the support posts by one of two third pivot members. Thus, the foldable shelf is expanded outward for use with a user and is folded when not in use.

Abstract: Method for manufacturing construction material and structure thereof. The method includes steps of: selecting at least three raw wooden materials; cutting the raw wooden materials along fiber direction thereof to form cutting faces with predetermined length and shape; and arranging the raw wooden materials side by side and connecting the corresponding cutting faces of the raw wooden materials with each other to sandwich a middle raw wooden material between a left and a right wooden raw materials. The middle and left and right raw wooden materials are respectively taken from different trees or the tree from which the middle wooden material is taken is different from the tree from which the left and right raw wooden materials are taken. Alternatively, the middle and left and right raw wooden materials are respectively taken from the same tree, while the growth layer of the middle wooden material does not correspond to the growth layers of the left and right raw wooden materials in the same position.