心轴

心轴	xīn zhóu	central axis / spindle
心	xīn	heart / mind / intention / center / core / CL:颗,个
轴	zhóu	axis / axle / spool (for thread) / roller (for scrolls) / classifier for calligraphy rolls etc
轴	zhòu	see 压轴戏 / Taiwan pr. [zhou2]