... instrument has such five display modes as B, B/B, 4B,B+M, and M. Under the B mode there are six magnifications: × ... Structure: portable and trolley, KJ-4001, 4002, 4003 and 4003(workstation)Display mode: Convex array: B, B/B,4B, B+M, and MMagnification: ×0 ... , bladder, womb, and urinary system and it can also be applied to check intrauterine equipment, pregnancy and so on. Portable B ultrasound machine