艳妇臀荡乳欲伦交换在线播放-超碰人人在线观看-少妇白浆呻吟爽-美女嘘嘘嘘aaaaaaaa级-日日夜夜欧美-国产成人精品久久亚洲高清不卡-亚洲欧洲成人av每日更新-天天狠天天干-嫩呦国产一区二区三区av-欧美性插b在线视频网站-久久国产精品广西柳州门-日韩免费特黄一二三区-国产成人福利美女观看视频-国产精品久久亚洲-国产亚洲精品欧洲在线视频

Features

This machine adpots the four-roller  structure with the upper roller as the main drive.providing the plates bending with torque through the engagement between the gear of the moderator and the gear of the upper roller.
The lower roller makes verial movemerits and imposes aforce on the piston throug  the hydraulic oil in the hydraulic cyinder so as to clamp the palte tight side rollers are arranged on the two sides of the lower roller.and make inclining movement along the guide rall; And provide drive througt the screw.the nut.the worm and the lead screw.
The advantage of the machine is that the preliminary bending and rolling of the top ends of the plates can be conducted on the same machine
Technical parameters