国产高清不卡视频,avxx,不卡视频国产,99热首页,日本道高清,日韩操操,成人亚洲国产综合精品91

Dezhou Hongxin Machine Tool Co., Ltd. specializes in producing all kinds of auxiliary tools for machine tools. TTG type combined boring and rolling head adopts the principle of one rough boring, one fine boring and one rolling. It has the advantages of high efficiency, stability, good guidance, small volume, light weight, etc., simple operation and stable processing. It is suitable for mass production.