Thread Guide
... 弯针 Looper 过线 Thread Guide 上、下刀 Upper/.. ...
overline
... overlay welding堆焊 overline过线、过界、跨线路的 overload过载、过负荷 ...
Pass Line
... 过线(Pass Line) 不过线(Don't Pass Bar) 来赌(Come Bet) ...
cross the line
bobbin winder tension bracket
line cross