Abstract: The present disclosure belongs to the technical field of biological products for veterinary medicine, and specifically relates to a recombinant foot-and-mouth disease virus (FMDV) with a reduced immunosuppressive activity, a preparation method and use thereof, and a recombinant vaccine strain. According to the present disclosure, it is firstly discovered that FMDV 3B protein has an immunosuppressive function, and key sites for exerting the immunosuppressive function are found. A recombinant FMDV vaccine strain with a lost immunosuppressive function in FMDV 3B protein is constructed by introducing amino acid mutations into three repeated copies of FMDV 3B protein.

Abstract: An additional brake device for a passenger transport device, a brake disc assembly, a wheel disc assembly, and a passenger transport device. The additional brake device comprises: a brake disc defining a hole and having an inner circumferential surface; a wheel disc having a wheel disc body and an extension, the extension being fitted into the hole of the brake disc and having an outer circumferential surface, and a first friction plate being provided between the brake disc and the wheel disc body; and a pressure holding mechanism which maintains a pressure between the brake disc and the wheel disc, wherein an intermediate member is provided between the inner circumferential surface of the brake disc and the outer circumferential surface of the extension of the wheel disc, the intermediate member comprising a metal or alloy material.

Abstract: A drive system (10) that is operable to drive a conveyor band (12) includes a drive motor (26), inner and outer drive shafts (28, 30), a gearbox (32), and a band engagement member (34, 36). The inner drive shaft (28) includes first and second ends (38, 40), the first end (38) being connected to the drive motor (26). The gearbox (32) includes input and output portions, the input and output portions being in geared connection with one another, and the input portions being connected to the second end (40) of the inner drive shaft (28). The outer drive shaft (30) includes a cavity (46) that extends through at least a portion of the outer drive shaft (30). The outer drive shaft (30) is connected to the output portion of the gearbox (32). The band engagement member (34, 36) extends radially outward from an outer surface of the outer drive shaft (30). At least a portion of the inner drive shaft (28) is positioned within the cavity (46) of the outer drive shaft (30).

Abstract: A drive system (10) that is operable to drive a conveyor band (12) includes a drive motor (26), inner and outer drive shafts (28, 30), a gearbox (32), and a band engagement member (34, 36). The inner drive shaft (28) includes first and second ends (38, 40), the first end (38) being connected to the drive motor (26). The gearbox (32) includes input and output portions, the input and output portions being in geared connection with one another, and the input portions being connected to the second end (40) of the inner drive shaft (28). The outer drive shaft (30) includes a cavity (46) that extends through at least a portion of the outer drive shaft (30). The outer drive shaft (30) is connected to the output portion of the gearbox (32). The band engagement member (34, 36) extends radially outward from an outer surface of the outer drive shaft (30). At least a portion of the inner drive shaft (28) is positioned within the cavity (46) of the outer drive shaft (30).