刮板输送机前轴轴承
drag conveyor front shaft bearing
平衡器轴前轴承
balancer shaft front bearing
前中部检视底板
front center access panel
主动轴前轴承
drive shaft front bearing
主轴前轴承
main spindle front bearing
中轴套
intermediate guide vane stem bearing
Willis环前部动脉
Willis circle anterior artery