Mournfully slowly they roll, silently swelling and mixing.
这些云悲哀地悠然舒卷着，无声地胀大，又融合。
Adopts air swelling shaft roll furling roller, convenient for production.
采用气涨轴收卷辊，方便生产。
Adopts air swelling shaft to furl roll (or to use pneumatic style to furl roll), the tension of furling roll can be adjusted.
无极调速调整张力。采用气涨轴收卷(或选用气动式收卷)，收卷松紧度可调。
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