| http://www.w3.org/ns/prov#value | - The structure and function of the MCF 27 is fully described in U.S. Pat. No. 3,564,463 to W. D. Beaver and R. A. Sykes and US. Pat. No. 3,576,506 to R. L. Reynolds and R. A. Sykes. it should be emphasized that the instant invention is not limited to the cutting of quartz crystal, for a variety of hard or brittle materials such as ceramics, aluminum, sheet steel, glass, etc. have been cut using the
|
