主轴承

main bearing

owner / master / host / individual or party concerned / God / Lord / main / to indicate or signify / trump card (in card games)

axis / principal axis (in mechanics, optics, botany etc) / main axle (of engine)

axis / axle / spool (for thread) / roller (for scrolls) / classifier for calligraphy rolls etc

see 壓軸戲|压轴戏[ya1 zhou4 xi4] / Taiwan pr. [zhou2]

(mechanical) bearing

surname Cheng / Cheng (c. 2000 BC), third of the legendary Flame Emperors 炎帝[Yan2 di4] descended from Shennong 神農|神农[Shen2 nong2] Farmer God

to bear / to carry / to hold / to continue / to undertake / to take charge / owing to / due to / to receive