输送机输送带张力调整
conveyor belt tension adjustment
振动输送机轴承座
vibrating conveyer bearing block
叶轮轴支承轴承
impeller shaft support bearing
主动轴支承轴承
drive shaft support bearing
双层滚轴输送机
overlapping roller conveyer
推土机油缸支承轴承
bulldozer cylinder support bearing
差速器支承轴承
differential support bearing
差速器支承轴承预紧力调整
differential support bearing preload adjustment