Parallel lines are lines that never cross each other - they keep the same distance apart from each other. When two lines intersect, the opposite (X) angles are equal. On parallel lines, alternate (Z) ...
Two gears can mesh without having a parallel axis, which puts the gears in the same plane. Shafts that intersect or are skewed can be used to change speed or torque, depending on the need. April 18, ...
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