The levers received their motion directly from the engine crankshaft, one being 90 degrees out of phase with the other.
For a normal field, the commensurability oscillations are weak and out of phase for transport in the different cleavage directions.
pendulums of two clocks hung on a wall close together would swing 180° out of phase.
quadrature encoder should provide square-wave signals that are 90 degrees out of phase with each other.
An ideal quadrature encoder should provide square-wave signals that are 90 degrees out of phase with each other.
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