Small weight, light weight, one-way ligator

Eg - squeeze the outer scroller (one-way bearing) can be used as a converter, a stopper, beyond the clutch. Hf (roller mixer): composed of pressing outer circles and plastics to keep the frame; holding the frame either with a plastic reed or with stainless steel reed guide roller, with an slope roller and a roller in the outer circle as a locker. Hfl (franchisers and bearing components): the bearing bearings are mounted on both sides of the roller clutch and bear a dyslexic load, and the bearings as the bearing bearings are rollers and plastics holding frame components