screw bell 中文意思是什麼
screw bell
解釋
打撈母錐-
Maximize the stitch length, and turn the handwheel until walking foot 1 reaches its front end position. now, loosen screw 2 in the center shaft bell crank
把縫跡調到最大,轉動飛輪,在外壓腳1前進到最前的位置擰松中軸輪緊固螺絲2 。
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