简略地介绍了世界上和国内第一批激光器的诞生背景和经过。列举了中国激光技术的初期发展以及我国政府采取的有力和有效的措施。介......

Chinese natural gas Pools (fields) are chiefly hydrocarbon gas pools (fields), with a few of CO2 and a tiny of H2S ones.......