[机]?中凸形螺旋弹簧

... barrel-shaped chair 半圆形安乐椅 barrel-shaped spring 中凸形螺旋弹簧 barrel-shaped spring 鼓形弹簧 ...

[机]?鼓形弹簧

... barrel-shaped spring 中凸形螺旋弹簧 barrel-shaped spring 鼓形弹簧 barrel-type airless shot-blasting machine 滚筒式抛丸清理机 ...