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据苏刊1981年第4期报道,用 B_4C加聚乙烯醇调制成膏剂,涂于38XHM(38CrNiMo)钢制法兰上,厚0.2～0.3毫米,经高
According to the Soviet Union reported in 1981 No. 4, with B_4C plus polyvinyl alcohol formulated into a cream, applied to 38XHM (38CrNiMo) steel flange, 0.2 to 0.3 mm thick, high