The multifinger caliper tool string to be used for casing inspection was centralized using the combination of a strong, optimally placed, spring loaded roller and stiff arm centralizers.
It's made from a chair arm, Razor Scooter and Roller Blade and misc wood.
这是从手臂一把椅子，剃刀滑板车和压路机叶片和其它木材。
3
The utility model relates to a support arm for processing the inner ring of a cylindrical roller bearing, which belongs to the technical field of the bearing technological equipment.