Abstract: A countertop installation assembly comprises an installation seat, a driving member, and a fastening assembly. The installation seat is positioned in the installation hole and is configured to extend to below the countertop. The installation seat comprises a receiving cavity extending along a longitudinal direction. The driving member is rotatably disposed in the installation seat. The fastening assembly is operatively coupled to the driving member, and the fastening assembly is located below the countertop and moves up and down in the receiving cavity. The driving member is rotated from above the countertop to drive the fastening assembly to move up and down in the receiving cavity so as to enable the fastening assembly to be clamped to or separated from a lower side of the countertop. The fastening assembly is driven by the driving member to move between a retracted position and an extended position.

Abstract: The disclosure presents a quick mountable assembly for handle, a handle assembly, and a method of mounting the same. The quick mountable assembly for handle includes a tube having a first peripheral section and a second peripheral section arranged in a circumferential direction. The second peripheral section includes convex threads compared to the surface of the first peripheral section. The assembly further includes a nut having a first inner wall section and a second inner wall section arranged in a circumferential direction. The second inner wall section has convex threads compared to the surface of the first inner wall section. The nut has a first engagement position in which the second inner wall section aligned to the first peripheral section of the tube and a second engagement position in which the second inner wall section screwed to the second peripheral section of the tube.

Abstract: Present disclosure relates to a pipe joint for quick releasable pipe connector assembly and a quick releasable pipe connector assembly. The pipe joint for quick releasable pipe connector assembly includes an annular part defining a central axis, a pair of shank parts being arranged symmetrically with respect to the central axis and each with a free end away from the annular part, an inner surfaces of the pair of shank parts being spaced from each other in a direction away from the annular part, and a buckling part being connected between the annular part and the pair of shank parts and being provided with a slot. The pair of shank parts and the buckling part are configured to be elastically deformed under an external force to approach the central axis and to automatically reset when the external force is removed.

Abstract: A purification method of a recovered aluminum melt for an automobile hub includes nitrogen degassing of a gas permeable brick pouring ladle bottom layer arranged on a lower portion of a gas permeable brick pouring ladle and argon degassing of a rotor degasser arranged on an upper portion. The invention has a good degassing and deslagging effect and high purification efficiency, and achieves energy conservation and environmental protection.

Abstract: An optical communication device, an optical communication system, and a method for establishing a communication connection are provided, relating to communications technology. In the optical communication device, the first driving circuit can control, based on the generated first target plaintext, the optical signal transmitting circuit to transmit the first optical signal, and control, based on the generated first key, the optical signal transmitting circuit to transmit the second optical signal. That is, an optical communication device that detects the optical signals can establish, based on the optical signals, a communication connection with the optical communication device that transmits the optical signals.