paper roll tube 纸筒芯管
Fashioning a tube out of an empty toilet paper roll to just fit into the bottle mouth is very helpful.
自己用卫生纸搞个管子让他正好适合那瓶子的嘴巴是个不错的主意。
It is recommended near the paper tube around each roll and do not use the outermost circle.
建议每卷靠近纸管一圈和最外面一圈不要使用。
Some problems about the construction, parameter determination and roll profile design of the short thin-walled tube skew roll straightener are discussed in this paper.
本文讨论了薄壁短管斜辊矫直机结构、参数确定和辊形设计中的几个问题。
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