杨幂大战老外三分钟四十八秒_国产果冻传媒精品AA片在线_国产成人精品无卡无码AV在线_成在线人a∨免费无码高潮喷水_青青青亚洲精品国产_伊人俺去久久涩五月综合_变态+美女+日本漫画_性开放性开放交友网站_按摩师添我下面好舒服_日本中文字幕有码

Precautions for operation of plastic sheet machine

For the present market, to improve the economic development needs products to promote, which is a fundamental, without products as a medium, there can be no progress. Then the product itself should ma…

he main machine of plastic extruder is extruder, which is composed of extrusion system, transmission system and heating and cooling system.

The large-scale plastic extruder can reduce the production cost, which is more obvious in large-scale twin-screw plastic granulation unit, film blowing unit, pipe extrusion unit and so on.

Plastic extruder is an important equipment in the wire and cable processing industry. In the production and use, the extruder temperature control system is the part with frequent failures. In this pap…