又大又爽又粗又硬又黄的免费视频-国产亚洲香蕉视频-国产欧美一区二区二-国产精品国产三级国产av品爱网-日本内射在线播放-youjizz.com中国

Introduction of Cooling Mode of Film Blowing Machine

Introduction of Cooling Mode of Film Blowing Machine
Film blowing machine produced by the air-cooled products are also water-cooled.
Air-cooled half of the blowing method, the water is generally under the blowing method, the cooling water temperature can be room temperature, unless your temperature is very special, need special control of water temperature, the water temperature of 5 degrees --- 30 degrees optimal.
Copyright ? Ruian DeBang Machine Co.,Ltd.