国产一区二区三区av在线无码观看_国产成人精品一区二区三区免费_国产未成女一区二区_色噜噜狠狠色综合成人网_亚洲av永久无码精品放毛片

The FAG bearing brand is also inspired by a genius. As early as 1883, in the small town of Schweinfurt in Germany, Friedrich Fischer designed a special steel ball grinding machine, which for the first time made the use of grinding to produce a complete sp

How to choose the bearingThe selection of bearings can be started from the following aspects:First, the load direction, size and natureAll radial bearings can withstand radial loads. All thrust bearings can withstand axial loads, while angular and radial

Bearing clearance is also known as bearing clearance. The so-called bearing clearance refers to the amount of movement when the bearing is fixed to one of the inner ring or the outer ring when it is not mounted on the shaft or the bearing housing, and the