There are only six simple machines: the lever, the block, the wheel and axle, the inclined plane, the screw, and the gear. All complex machines are combinations of these simple machines. Of particu……続きを見る
Gyros are the fundamental technology behind innertial navigation systems, stabilized instrument platforms, and weapon(s) stabilization systems.
"Synchro" is the name given to a variety ……続きを見る
