枢轴

枢轴	shū zhóu	pivot; fulcrum
枢	shū	(bound form) hinge; pivot (usu. fig.)
轴	zhóu	axis / axle / spool (for thread) / roller (for scrolls) / classifier for calligraphy rolls etc
轴	zhòu	see 压轴戏 / Taiwan pr. [zhou2]