过线具押线板螺丝
bobbin winder tension screw
针杆拦线板螺丝
needle bar thread guard screw
印制板无芯平面圆形螺旋电感线圈
PCB coreless planar circular spiral inductor coils
MICE超导螺线管磁体
MICE superconducting solenoid magnet
阿基米得螺线天线
Archimedian spiral antenna
antenna
Archimedian spiral
阿基米德螺线槽模具
Archimedes spiral cavity mold
阿基米德螺线天线
Archimedian spiral antenna
艾克门折速螺线
Ekman velocity-defect spiral