Abstract: A robotic welding device employing a flexible guide rail comprises: a control box (2) pre-storing various welding processes and generating a welding parameter; a wire feed mechanism (7) feeding a welding wire to a welding gun (4); a flexible guide rail (8) attached to a welding component with the flexibility thereof; a welding robot comprising a robot body (3) and a welding gun (4), the robot body (3) being movably disposed on the flexible guide rail (8) along the same, and the welding gun (4) being disposed on the robot body (3) and controlled by the same to weld the welding component; a demonstrator (6) signally connected with the welding robot and the control box (2), controlling, a traveling path and an operation position of the welding robot, and adjusting oscillation and welding operations of the welding gun (4) according to an instruction of the control box (2); a remote control terminal (11) signally connected with the control box (2) so as to remotely monitor and configure the welding parameter, and

Abstract: Disclosed is a combined rigid ureteroscope which comprises a rigid ureteroscope body and a tubular sheath outwardly fitted on a tubular part of the ureteroscope body. A starting end of the sheath is closely engaged with the tubular part of the ureteroscope body. A locking mechanism is provided at a rear end of the sheath. A locking part is provided between the tubular part of the ureteroscope body and an operation part of the ureteroscope body. The locking mechanism is cooperated with the locking part to lock or unlock the rigid ureteroscope body and the tubular sheath. In operations of examining, diagnosing and treating the ureter and the kidney by employing this invention, it saves operation procedures, shortens operation time, improves operation safety, avoids problems of difficult operation and easy damage of the flexible ureteroscope, and realizes safety, effectiveness and low cost in the clinical treatment.