three-over-four roller drafting 三上四下罗拉牵伸
three over four roller drafting 三上四下罗拉牵伸
roller drafting 罗拉牵伸
four roller drafting 三上四下罗拉牵伸
combing roller drafting 梳辊牵伸
simple roller drafting device 简单罗拉牵伸装置
The pressure variation of front roller influences the drafting force slightly.
前罗拉压力改变对牵仲力影响很小；
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