单词	four-start spiral
释义	four-start spiral 四头螺旋
随便看	friction characteristic friction characteristics friction circle friction circle analysis friction circle method friction clamp friction clamping friction clamping plate friction clay friction claygouge friction cleaner friction cleaning friction climbing friction clip coupling friction cloth frictionclutch friction clutch friction clutch assembly friction clutch coupling friction clutch cup Friction Clutches friction clutch, fluid-actuated friction clutch, hydraulic friction clutch friction clutch of double-disk dry type friction clutch of double-disk,dry type