As the development of. the modern dry kiln has progressed, a number of de-. sign modifications have been explored in relation to the. mechanism of heat supply, arrangement and type of. fans, control of relative humidity or wet-bulb temper-. ature, and use of various materials for construction of. the chamber.
as-built drawing. A working drawing as modified during construction; includes a record of concealed items (such as conduits for building services), thereby providing information for future reference. Also called record drawings. 1  Facebook. 2  Twitter.
Mechanical Drawing Symbols. Mechanical systems drawing is a type of technical drawing that shows information about heating, ventilating, and air conditioning. It is a powerful tool that helps analyze complex systems. These drawings are often a set of detailed drawings used for construction projects; it is a requirement for all HVAC work.