presser r bar spring押杆簧
presser r bar lifter压紧杆扳手
Presser bar pressure regulating压杆压力调节
Presser bar flat spring压杆板簧
Presser bar spring washer压脚杆弹簧垫
presser bar spring押杆簧;压脚杆弹簧
presser bar lifter手抬压脚;压紧杆扳手;压脚升降器;针夹
Presser bar guide bracket压脚杆导架
Presser bar pressure压紧杆压力