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mechanical device of new concept allowing the transmission sweet and gradual motion from a tree farmer in rotary axial rotary motion tree led both in state andyou in motion according to the operation of the traditional rotary axial friction but with the absence of friction bodies
mechanical device of new concept allowing the transmission sweet and gradual motion from a tree farmer in rotary axial rotary motion tree led both in state andyou in motion according to the operation of the traditional rotary axial friction but with the absence of friction bodies