Based on the discussion of shortcomings of the close CAI, this paper proposes a way to create an object oriented open hypermedia CAI system, and describes the general thoughts, main functional modules and key techniques of building this open hypermedia CAI system using the object oriented program designing language C++.

The development and application of the closed negative pressure oil well pump;

Characters and installation of concentrated closed bus;

Development of Automatic Volumetric Closed-filling-sealing Machine for Soft-packaging Beverage

Bench of closed circuit cooling tower that is composed of boiler ,exchanger, orifice flowmeter, water pump, micromanometer , heat indicator and so on is established.

The thermal performance test apparatus of closed circuit cooling towers was introduced on the basis that the principle and characteristics of the new cooling tower was expounded.