Analysis is done to the main working principle of cots plus aprons in drafting process as well as the main specifications of cots plus aprons on spinning process.
分析了胶辊、胶圈在纺纱牵伸过程中的主要作用原理，以及胶辊、胶圈主要技术性能与纺纱工艺之间的关系。
There was a large, low-ceiled room, with clacking, rattling machines at which men in white shirt sleeves and blue gingham aprons were working.
那是个天棚很低的大房间，里面排列着发出隆隆声响的机器。
There was a large, low-ceiled room, with clacking, rattling machines at which men in white shirt sleeves and blue gingham aprons were working.
那是个天棚很低的大房间，里面排列着发出隆隆声响的机器。
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