id	keyword
ap-5286	bearing
ap-5286	load
ap-5286	lubrication
ap-5286	contact
ap-5286	roller
ap-5286	lubricant
ap-5286	film
ap-5286	figure
ap-5286	distribution
ap-5286	rolling
ap-5286	clearance
ap-5286	speed
ap-5286	effect