Pointes pour pivots, particulièrement pour boussoles ou compas et instruments scientifiques
摘要
<p>1,056,944. Ruthenium alloys. INTERNATIONAL NICKEL Ltd. Dec. 8, 1965 [Jan. 19, 1965], No. 2331/65. Heading C7A. A pivot tip for a compass or scientific instrument is made of an alloy 4-6% Zr and the remainder Ru.</p>
