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#wankel #rotary engine #rotor #eccentric shaft #engine mechanics #spinning triangle #apex seal #epitrochoid

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#rotary combustion #engine cycle #wankel power #spinning rotor #internal combustion #epitrochoid

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#spirograph #geometric pattern #spiral art #hypotrochoid #epitrochoid #rosette pattern

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#spirograph #drawing toy #geometric art #hypotrochoid #epitrochoid

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#deferent #rolling #point trace #epitrochoid