Abstract: A network management system comprises a unit for identifying a node, whose settings are to be modified, from design pattern information about a network to be managed; a unit for finding values of various timers included in the network management system and in the node whose settings are to be modified about the identified node based on a template for timer control; and a unit for causing the found values of the timers to be reflected simultaneously in the network management system and in the node whose settings are to be modified.

Abstract: An electrically powered torque-controlled tool having an electric motor which rotates a bit, whereby a screw, bolt or nut fitted at the front end of the bit is tightened. The tool is designed so that when the tightening force exerted by the bit reaches a preset torque, the driving by the electric motor is stopped by opening the switch and concurrently therewith a clutch interposed between the electric motor and the bit is disengaged and held in this released state, thereby avoiding the reaction which would otherwise be produced by the motor inertia immediately after the tightening, thus achieving a high-precision tightening operation.