Abstract: An immersion cooling equipment includes an immersion cooling device, a heating component and a cooling liquid. The immersion cooling device includes a tank providing cooling by immersion and a liquid supply equipment. The tank providing cooling by immersion communicates with the liquid supply equipment and accommodates the heating component and the cooling liquid. The tank providing cooling by immersion includes a mounting bracket, a cooling box, and a sealing plate. The cooling box is positioned in the mounting bracket, the cooling box comprising a plurality of walls, the plurality of walls surround a reception space, the reception space comprising a first opening. The sealing plate is detachably connected or rotatably connected the cooling box, and is used to close or reveal the first opening. Each the walls is made of thermoplastic plastic, and any two abutting walls are fixed by plastic welding.

Abstract: A fastening member includes a columnar body and a buckling portion. The columnar body defines a threaded hole along the axial direction of the columnar body and a groove around the external surface of the columnar body along the radial direction of the columnar body. The groove divides the columnar body to a first restriction portion, a second restriction portion and a connection portion. The connection portion is surrounded by the groove. The first restriction portion and the second restriction portion are positioned at two ends of the groove. The buckling portion extends from the first restriction portion away from the first restriction portion. The disclosed subject matter also provides a hard disk fastening apparatus which fastens a hard disk using the fastening member.

Abstract: A fastening member includes a columnar body and a buckling portion. The columnar body defines a threaded hole along the axial direction of the columnar body and a groove around the external surface of the columnar body along the radial direction of the columnar body. The groove divides the columnar body to a first restriction portion, a second restriction portion and a connection portion. The connection portion is surrounded by the groove. The first restriction portion and the second restriction portion are positioned at two ends of the groove. The buckling portion extends from the first restriction portion away from the first restriction portion. The disclosed subject matter also provides a hard disk fastening apparatus which fastens a hard disk using the fastening member.

Abstract: A metallic shell includes a metal layer having an outer surface. The outer surface defines at least one engraving portion. Each engraving portion includes a base portion and a sidewall connected between the outer surface and the base portion. The metallic shell further includes a protective layer with a first color. The protective layer coats the outer surface and the base portion. A second antioxidation coating with a second color different from the first color is coated on the sidewall of the at least one engraving portion. A method for etching a pattern on a metallic shell is also provided.