这些轴承的滚筒是轴向钻通的，通过所谓的插销式保持架的插销引导。
The rollers of these bearings are axially through-bored and are guided by the pins of a so-called pin-type cage.
色机：一部回转滚筒，有时是平台稿架的装置。
Electronic colour scanner: a device using rotating drums, sometimes a flatbed copy holder.
专业生产工作台、工作凳、滚筒支架、脚手架、手推车系列。
Specializing in the production of workbench, work stool, roller stents, scaffolding, trolleys series.
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