Recently, Zhu Xing and Ren wei, the manager of intelligent equipment department , lead testing team, machinery team and hydraumatic team to research the technology for Knuckle boom holding. and make numerical simulation and on-site simulaiton test several times within one month to insure every parts of Knuckle boom work well.
All the technician of this team have gave up their international Labour Day vacation and keep working, they do their efforts and complete all the machinery action within the working radius within 12-25 meters successfully.

On 4th May, all the technician still keep wokring though it is raining,collected and fed back the related data,so that they can complete test of grabing the drilling pipes and drill collars with joint efforts.