EHC (ELECTRONIC HARDWARE)
旋钮, 圆形杆, 6.35 mm, 塑料, 带指示线的圆形滚花, 18.288 mm
旋钮, 带指示箭头圆形边缘, 17.78 mm, 塑料
旋钮, 圆形杆, 3.175 mm, 塑料, 带指示线的圆形滚花, 18.288 mm