单词	angle of action
释义	angle of action : the angle of revolution of either of two wheels in gear during which any particular tooth continues in contact Word History First Known Use 1803, in the meaning defined above
随便看	porousness porousnesses porousser poroussest porpentine porpesses Porphyra Porphyraceae porphyrae porphyras porphyratin porphyrean rubricity rubricked rubricking rubrics rubrocortical rubrofugal rubropetal rubs rubs along rubs elbows rubs elbows (with) rubs elbows with rubs in

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