日韩免费无码视频_无码乱码AV天堂一区二区人妻熟妇乱又伦精品无码专区_亚洲色精品一区二区三区首页_国产欧美日韩精品久久一区二区_丁香婷婷亚洲一区_日韩欧美理论一级片_国产网站黄页网站在线免费观看_国产亚洲精品va在线观看_玩弄丰满少妇人妻视频_91男女无遮挡猛进猛出免费

PERFORMANCE FEATURES:
1、The construction of this machine is in the form of three roller symmetry.
2、The top roller in the central symmetrical position over the two bottom rollers does vertical motion up and dow through screw,nut and worm transmission.
3、The two lower rollers rotates and provide the plate materials with torque through the engagement of the output gear of the moderator with the gear of the lower rollers.
4、The construction of the machine is compact and the operation and maintenance is convenient.

Technical parameter: