These spherical roller bearings are equipped with window-type cages of pressed sheet steel, glass-fibre reinforced polyamide or brass.
球面滚子轴承，这些配备了窗口式铁笼压钢板，玻璃纤维增强聚酰胺或铜。
2
In this article, the principle and application of a new kind of instrument used to test the tensile stiffness index and fibre orientation distribution on a paper sheet were introduced.