... 铜罗伞 chinese indigo root or herb 铜罗拉 brass roller 铜螺旋法 rubber-determination of free sulphur-copper spiral method ...
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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。
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