... -control or digital closed-loop control for traveling block position, trip speed, safety presetting and interlock ... brake + dynamic brakeEATON brake + dynamic brakeCrown blockTC135TC170TC225TC315TC450Traveling block YG135YC170YC225YC315YC450OD of sheaves of hoisting system, mm1005112012701524HookYG135YG170DG225 or ... 40,50,70,90DBS,drill rig,factory price,09new style,tech from USA