单词	expanded thread
释义	expanded thread 胀扣
随便看	friction disk clutch friction disk damper friction disks friction disk saw friction disk shock absorber friction distribution friction disturbance friction draft gear friction draft spring friction drag friction drilling machine friction drive friction-drive friction drive developing machine friction drive hoist friction drive loudspeaker friction driven friction-driven loudspeaker friction driven spools Friction Drive of Self-press friction drive press friction driver Friction drive rollers diameter mm friction driving friction driving device