绝妙蓝调
arm车身arm shaft主轴balance wheel / hand wheel扳轮/尾轮bed车台bed shaft底轴bobbin winder绕线器face plate门盖knee lift抬脚器thread stand线架bobbin梭心bobbin case梭匣bobbin case latch梭匣柄bobbin case tension spring梭匣簧feed dog狗牙器needle bar针把needle clamp针夹presser bar lifter手抬压脚presser foot压脚stitch regulator针步调节器throat plate / needle plate喉片thread guard护线器thread guards / eyelets导线器thread take-up跳线器tension devices / tension disco夹线器oscillating shuttle来回式梭仔rotary hook旋转式梭仔
优质英语培训问答知识库
