Technical terms per letter "M"
Middle gear shaft is a working name for a gear shaft located between the input shaft gear and output shaft gear, and transmitting mechanical energy between them.
Mouth (of a hook) – the place where removable load gripping device is seated in the load crane hook inner diameter.
Moving pulleys (mech.) are blocks the axes of which together with the supports can travel in space. As a rule these movable pulleys contain a lifting unit (hook) to which any load is hooked.
Multiple gearing is a mechanical transmission consisting of 2 or more pairs of gears.