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

介绍过捻器、矫直器、牵引槽轮、收线装置的作用。

youdao

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

介绍过捻器、矫直器、牵引槽轮、收线装置的作用。

youdao