Up to medium size, cylindrical roller bearings are generally fitted with a cage of glass-fibre reinforced polyamide or a pressed sheet-steel cage.

直到中号尺寸，圆柱滚子轴承一般都配置一个玻璃纤维增强尼龙保持架或一个钢板冲压保持架。

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Each damper is a short sheet metal vent pipe fitted with a circular damper plate within the vent pipe, and attached to a square anchor plate.

每一个节气阀都是由一个短的金属片的排气管再安装上圆形的风挡，然后粘上真方形的固定板制成的。

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Each enormous block is perfectly cut, polished smooth and fitted so tight not a sheet of paper would slip between them.

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