What does KT mean in cad papers?

KT in cad drawings generally refers to air conditioning.

Computer-aided design refers to the use of computers and their graphic devices to help designers complete the design work. In design, computers are usually used to calculate, analyze and compare many different schemes to determine the best scheme; All kinds of design information, whether digital, literal or graphic, can be stored in the internal memory or external memory of the computer and can be quickly retrieved; Designers usually start with sketches, and the heavy work of turning sketches into working drawings can be handed over to computers. The design results automatically generated by computer can quickly make graphics, which is convenient for designers to judge and modify the design in time; Computers can be used to process graphic data related to editing, enlarging, reducing, translating, copying and rotating graphics.