Compared with the size differences between the trough of ordinary detection trough and the head special slot,introduced by the ordinary detection trough to the trough of special programmes,welding process, welding deformation control,to resolve the problems about the central section slot in the process of repairing.

The application of optical fiber sensing technology to rock deformation test is studied.

Edge checking based on form cutter CAD/CAM for involute gears;

The edge checking system uses CNC technology in the movement control of the system to enhance the precision of edge checking.

Deformation inspection of petroleum and gas pipeline is very important for the operation security of pipelines.