The purpose of prebending process of longitudinal submerged arc welding pipe production line is introduced;character of roller prebending and mould press type prebending is analyzed.
The artical detailedly reviews the adhibition of three both series hydrolyze technics in the furfural production and the merit of economize energy resources and increase production.
The exploratory testing study of modifying and fining the solidification structure of concast steel billet is carried out in concast production by the technology of electro-pulse modification.
This series equipment and big type sicve of circinal cylinder may be controlled By PLC so that it will bre automatic running to continue in the working processing.
This machine is the Rotary Drum of fracton backhaul tube,it is used to heat up the oil and soap mixer in continuous producing,make it to the art temperature which has been regulated.