After cable installations, its burial situations on and/or in seabed may change as time goes on and even cable damages and faults can happen, so engineering maintenance is often required.

Application of exploring-radar in road construction and maintaining;

Research on Maintaining the Migrant Workers Rights and Intrests;

From managing notion,designing,material,constructing maintaining,it elaborates countermeasures of improving tunnel durability,in order to improve tunnel durability.

Operation and Safeguard for Nickel Cadmium Alkaline Storage Batteries;

Create and Safeguard Route Date of Interregnum Date in the Exchange Date;

On the management and safeguard of digital language lab;

Maintain and Improve for Electric Control System of Laroche Equipment in Spunlace Line;

Using and Maintain of A Value Determine Device of ZMJ Type;

Operation and Maintenance of Tapping Hole during Late Campaign;

Weld Repair and Maintenance of the Steel Belts in the Rotary Belt Condensation Granulators;

The maintenance of DCS system based on Deltav platform;