나사 플랜지

Screwed Flange

나사게이지

Thread Gauge

나사깍기기계

Screw Cutting Machine, Threading Machine

나사닻줄멈추개

Screw Type Chain Stopper

나사밀러

Thread Miller

나사식 컨베어

Screw Conveyor

나선각

Herical Angle

나선계단

Winding Staires

나선기어

Herical Gear

나선체

Naked Hull