青年工人李瑞友是青岛四方机车车辆制造工厂制材车间的杂工。他一贯重视节约,处处精打细算,提了很多节约物料的建议。今年三月中旬他又发现翻砂车间铸铜 Li Ruiyou, a young worker, is a handyman in the workshop of the Qingdao Sifang Locomotive and Rolling Vehicle Manufacturing Plant. He always attached great importance to economy, he was careful in his calculations, and he proposed many suggestions for saving materials. In mid-March this year, he also discovered the copper foundry workshop.