Locked cylinders are also called locking cylinders, and they are also called end-locked cylinders, and they are divided into front-end locks and rear-end locks;they can ensure that the cylinder automatically locks when the air is cut off, effectively preventing falling. Safe, reliable and guaranteed. The bore diameter of the locking cylinder is divided into 40, 50, 63, 80, 100, 125, 160, 200, 250 and 320MM, and the stroke can be customized at will. The fixing methods include basic type, front flange FA, rear flange FB, rear single ear CA, rear double ear CB, front and rear tripods LB, intermediate shaft TC, intermediate shaft with seat type TC-M and other accessories.