| 摘要 |
A heat generating apparatus by use of multistage rotary means comprises a tubular casing having an air suction inlet and an air discharge outlet, and two or more rotary means disposed on a multistage manner in said tubular casing. An air friction heat generating area is formed in a slight gap of a rotation area of each rotary means and a suctioned air is heated on each stage level while reducing or pressurizing the air pressure within the chamber at a continuously balanced level.
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