【机械工程】使用余热、太阳能

unweighted pair-group method using anarithmetic average

making magnesium-treated cast iron using master alloys

using electromagnetic waves, partical radiation

combination of different types of cyclones using free vortex flow

percussive tool, portable using centrifugal impact elements

aircrafts using in flight the features of both aeroplane and

power plant using vaporous industrial gas as working fluid

clamping connection using toggle