工程师说钚可能会开始从遭腐蚀的潜艇往外渗透。Engineers said that plutonium could begin seeping from the corroded sub.危险的辐射物从钚放散出来.Dangerous emissions radiate from plutonium.钚也可以用来制成核武器.The plutonium also could be used, however, to make nuclear...
你为什么不先扭紧小齿轮的螺帽?Why don't you try tightening the pinion nut first?阐述了用化学蚀剂法加工 非圆齿轮 的方法.Setting forth a method of utilizing chemicals to process non - circular gear .因这些小齿轮与不小齿轮的啮合场所是保持的.As a result of these small gea...
Ground controllers will then fire the booster, sending the satellite into its proper orbit.然后地面控制人员将会发射推进器，把卫星送入正常轨道。At the front line of the financial control system are the controllers.处于财务控制系统最前列的是审计员.The electrical s...
企业后勤学杂志》论述运输与分配等物流理论与技术.Journal of Business Logistics.它影响不仅储藏决定,而且后勤学系统的设计.It affects not only warehousing decisions but also the design of a logistics system.五个主要阶段是入站后勤学 、 操作 、 对外后勤学 、 营销和销售, 以及服务.The five primary stag...