亚洲免费精品aⅴ国产_国产成人免费a在线视频色戒_国产成人精品免费视_亚洲国产日韩欧美高清片a_免费国产成人高清在线观看直播_国产成人精品影视,日日夜夜免费观看完整版电影,日日夜夜精品免费视频,啦啦啦中文免费视频高清观看

laminated steel production and application

Shanghai Lianjing has obtained the first authorized invention patent for the development of high-temperature hot-melt laminated steel process and equipment in China, and has independently designed and developed an annual output of 50000 tons of high-temperature hot-melt laminated steel production line, in which the core heating laminating process section equipment has independent intellectual property rights, and the equipment won the "Shanghai patent new product" in 2014.