长征五号「胖五」火箭发射成功背后，有哪些技术难点？
公司简介，帮忙翻译一下啊，用翻译软件之类的就免了，谢谢 Our company is a design，production，processing，matching the one，in fixture，fixture，mold design，processing，production；automated production line improvement；electrical and mechanical equipment，electronic products，test equipment R&D and sales of integrated enterprise.It is located near the XXX University city，all-around convenient transportation，advanced communications and beautiful environment.Factory covers an area of about 2 thousand square meters，owns strong fixed assetsThe company in the conventional processing，special materials，production and development，for production of the jig and fixture manufacturing，non-standard equipment and instrumentation to design，develop，manufacture，and labor-intensive artisanal Zuzhuang Du has abundant strength，and during the machining Xing Ye thus breaking some results.And processing for foreign clients to plan a variety of shafts，instruments Fittings，Valves，shaped a series of supporting parts machining.Our machined components are already 。
线切割设备统一编号是什么 如DK77-32，DK76-32D-电火花类K-数控类77-快走丝76-慢走丝32-X轴行程320mm现在比较常见的快走丝有：DK77-25(250mm x 320mm)DK77-32(320mm x 400mm)DK77-40(400mm x 500mm)DK77-50(500mm x 630mm)太小行程和太大行程的较少，有些厂家将线切割丝杠的余量全部利用，于是有：DK77-28DK77-35DK77-45以及Y轴加长等等型号。
