... 30m Automatic Tank Welding Machine(Bottom to Top);Automatic Tank Welder(Bottom up)Suitable for industries ... All the machines are applicable to botton-to-top tank erection, hanged on shell top5, First ... 30M.For tank erection, we can provide not only high efficient automatic machine, but also installation ... very mature experience in both bottom-to-top and top-to-bottom tank construction.Welcome to visit ...