摘要：1 前言 舞钢4200mm轧机是我国第一套完全依靠国内技术力量,自行设计,独立制造,自行安装的宽厚板轧机。自1978年9月8日轧出第一块钢板以来,经过17年的生产。已累计生产钢板345万吨。

摘要：LECR2 (Lanzhou ECR ion source No. 2) has been used to provide multiply charged ion beams for HIRFL cyclotron for many years. This source works at 14.5 GHz and is designed according to the high-B mode theory. Optimum design, good enough vacuum condition and the other favored conditions make this source be performed reliably and highly. Till now, the controlling of the source is still working under the long-distance manual analog controlling status.