Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: The present disclosure provides a method for preparing a composition including mesenchymal stem cells, extracellular vesicles produced by the mesenchymal stem cells, and growth factors, the composition prepared by the method, and use of the composition for treating arthritis. The composition of the present disclosure achieves the effect of treating arthritis through various efficacy experiments.

Abstract: The present disclosure provides a method for treating liver cirrhosis by using a composition including mesenchymal stem cells, extracellular vesicles produced by the mesenchymal stem cells, and growth factors. The composition of the present disclosure achieves the effect of treating liver cirrhosis through various efficacy experiments.

Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: Trailer for stroller includes a wheel frame with a lifting seat, and a push rod capable of sliding along the movement direction of front and rear wheels, which can be folded between the wheel frame and the seat. The push rod drives the seat to rise and fall; and a locking structure used for locking the push rod to limit the slide of the push rod when the seat rises is disposed between the push rod and the wheel frame. The seat is driven to rise when the push rod slides and is pulled up, and the seat is driven to fall when the push rod slides and is retracted; and the locking structure ensures the stability of the seat.

Abstract: Trailer for stroller includes a wheel frame with a lifting seat, and a push rod capable of sliding along the movement direction of front and rear wheels, which can be folded between the wheel frame and the seat. The push rod drives the seat to rise and fall; and a locking structure used for locking the push rod to limit the slide of the push rod when the seat rises is disposed between the push rod and the wheel frame. The seat is driven to rise when the push rod slides and is pulled up, and the seat is driven to fall when the push rod slides and is retracted; and the locking structure ensures the stability of the seat.

Abstract: The present invention discloses a foldable stroller, comprising: a front wheel support frame, a rear wheel support frame, a seat support and push rods, the lower end of the front wheel support frame is provided with front wheel assemblies, and rear wheel assemblies are arranged at the lower end of the rear wheel support frame, the push rods each are connected to the front wheel support frame and the rear wheel support frame with pivot assemblies, the foldable stroller comprises not only a first folding structure that is connected with the pivot assemblies and capable of folding the push rods, but also a second folding structure capable of folding the front wheel support frame and the rear wheel support frame. The present invention has the advantages of simple structure, low cost, convenient assembly, smooth and easy folding, small folding size and convenient collection.

Abstract: A detachable assembly including: a detachable frame including elongated opposing side portions; an assembly structure affixed to the detachable frame, the assembly structure and the detachable frame defining a detachable portion of the detachable assembly; a mounted elongated track assembly, the elongated track assembly having opposing tubular tracks having interior slots adapted to receive the elongated opposing tubular side portions of the detachable frame in a sliding relationship.

Abstract: A detachable assembly including: a detachable frame including elongated opposing side portions; an assembly structure affixed to the detachable frame, the assembly structure and the detachable frame defining a detachable portion of the detachable assembly; a mounted elongated track assembly, the elongated track assembly having opposing tubular tracks having interior slots adapted to receive the elongated opposing tubular side portions of the detachable frame in a sliding relationship.

Abstract: A detachable assembly including: a detachable frame including elongated opposing side portions; an assembly structure affixed to the detachable frame, the assembly structure and the detachable frame defining a detachable portion of the detachable assembly; a mounted elongated track assembly, the elongated track assembly having opposing tubular tracks having interior slots adapted to receive the elongated opposing tubular side portions of the detachable frame in a sliding relationship.

Abstract: A carrier structure includes a lower platform substantially parallel to a ground surface upon which the carrier is placed and moved; a back wall connected to a back edge of the lower platform at a connection structure, the back wall and lower platform defining a first angle; a front wall connected to a front edge of the lower platform and opposing the back structure; opposing side walls connected to opposing side edges of the lower platform, the back, front and opposing side walls forming a compartment; wherein the back wall is tiltable away from the front wall to define a second, obtuse angle, between the back wall and the lower platform, such that the lower platform is configured to remain substantially parallel to the ground surface.