Mechanical service scopes system

We are the contractor providing services design and install mechanical systems as below: 
We design and install mechanical works follows:
Install heat Ventilating & Air Conditioning System (HVAC)
Install Cooling water or chilled water system.
Install water supply, hot water supply and sewage water system (plumbing).
Install fire fighting system.
Install saturated steam system.
Install Exhaust system and air treatment (scrubber system) 
Install Compressed air system.
Install Other utility systems: Purified Water RO, DI, gas pressure O2, N2, LPG