Critical element development of standard components for pipe welding/cutting by CO2 laser. - Oka, Kiyoshi; Japan Atomic Energy Research Institute; Kakudate, Satoshi; Nakahira, Masataka; Tada, Eisuke; Obara, Kenjiro; Kanamori, Naokazu; Taguchi, Kou; Kondoh, Mitsunori; Shibanuma, Kiyoshi; Seki, Masahiro (Ibaraki-ken : JAERI, 1994)