Rack:      Optimized for easy installation and support high-density server   deployment.

CDU:      Ensures that the coolant circulates through the system,  removing heat generated by the servers.

Manifold:      It allows the coolant to be evenly distributed among the servers while simplifying the layout and maintenance of the piping.

Intelligent PDU:    Not only provides electricity but also can  monitor power consumption, optimize energy efficiency and manage loads  when  necessary.