大口径厚壁管的坡口加工,长期以来一直用陈旧的蜗轮式坡口机,唐山陡河电站现场虽然进口了一台日本切管机,但不能加工坡口。北京电力建设公司的老工人王三牛同志,遵照毛主席“自力更生、奋发图强”的教导,发扬了“铁人”精神,在党委的支持和同志们的帮助下,试制成功一台固定式坡口机,在震后恢复陡河电站管道 Large-diameter thick-walled pipe groove processing, has long been with the old worm groove beveling machine, Tangshan Douhe power station scene while importing a Japanese pipe cutting machine, but can not be processed groove. Comrade Wang Sanniu, the veteran worker of Beijing Power Construction Company, followed the teaching of Chairman Mao’s “self-reliance and work hard to make progress” and carried forward the “iron man” spirit. With the support of the party committees and the help of comrades, the trial successfully produced a fixed beveling machine , After the earthquake to restore steep river power station pipeline