Abstract: The present invention belongs to the field of pharmaceutical chemistry, and relates to an N-(benzoyl)-phenylalanine compound used as an ?4?7 integrin antagonist, including the pharmaceutical composition and the use, and in particular to a compound represented by general formula (1). The compound exhibits good ?4?7 integrin binding inhibitory activity, can be used as a high-efficiency ?4?7 integrin antagonist, and used for preventing and/or treating ?4?7 integrin-related diseases such as autoimmune diseases and inflammatory diseases.

Abstract: A dual-drive transmission, comprising a front shaft, a back shaft, a rear axle housing having a pair of half shafts, a central propeller shaft, a hub, and an electromagnetic splined clutch; a forestage gear is disposed on the central propeller shaft, a drive gear engaged with the forestage gear is disposed on the front shaft, a pair of one-way transmission gears is disposed one on each end of the central propeller shaft, a final drive gear is disposed on the hub, a driven gear engaged with the forestage gear is disposed on one end of the back shaft, and the electromagnetic splined clutch is axially connected to the back shaft.

Abstract: A dual-drive transmission, comprising a front shaft, a back shaft, a rear axle housing having a pair of half shafts, a central propeller shaft, a hub, and an electromagnetic splined clutch; a forestage gear is disposed on the central propeller shaft, a drive gear engaged with the forestage gear is disposed on the front shaft, a pair of one-way transmission gears is disposed one on each end of the central propeller shaft, a final drive gear is disposed on the hub, a driven gear engaged with the forestage gear is disposed on one end of the back shaft, and the electromagnetic splined clutch is axially connected to the back shaft.