s of curvature in two carefully mounted on block or shell meridians at right angles to each of proper curvature, and rouge, other on the same side of the take the place of iron and emery, glass. These two curvatures have working out the last tiny abrasive Centering the lens. This operation is… … Drilling holes with diamond drills for rimless glasses. Making the oval cnt frith a diamond point on an oval swinging upright lathe. HOW YOTTB EYEGLASSES ABE MADE,
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