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Movement 400
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赔率bet400. Four-motion feed (A. B. Wilson’s patent), used on Wheeler & Wilson’s, Sloat’s, and other sewing machines. The bar, A, is forked, and has a second bar, B (carrying the spur or feeder), pivoted in the said fork. The bar, B, is lifted by a radial projection on the cam, C, at the same time the two bars are carried forward. A spring produces the return stroke, and the bar, B, drops of its own gravity.

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