photo-electricity protection device emergency braking device simple structure, convenient operation Power Press(J23)J23 series of press machine is general open tilting press machine, which have simple structure, convenient operation and reliable performance. JC23-6.3, J23-10B, J23-16, J23-25A, JG23-35A, JG23-40A, JC23-63A and J23-80A use the rigid rotating key clutch. It is convenient to repair. ...