介绍过捻器、矫直器、牵引槽轮、收线装置的作用。

To introduce the functions of the over-lay apparatus, the straightener, the traction grooved pulley and the take-up.

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介绍过捻器、矫直器、牵引槽轮、收线装置的作用。

To introduce the functions of the over-lay apparatus, the straightener, the traction grooved pulley and the take-up.

youdao