"Ussr." . . "Refining." . . "Degasification." . . "Cutting." . . "Melting." . . "Cleaning." . . "Fabrication Metallurgy." . . "Properties of Metals and Alloys." . . . . "The following questions are examined: ultrasonic cutting, and surface finishing of materials; degasification of liquids; and crystallization of metals."@en . . . . . . . "Physical Principles of Ultrasound Technology (Selected Excerpts)"@en . . . . . . "FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO." . . "Industrial research." . . . .