(4) adjusting the lawful: tone pitch originally referred to the legal production of crude oil by the same proportion of four components constituting the pitch according to the quality requirements needed to re-blending, the price of asphalt, the resulting product is called synthetic asphalt or asphalt reconstruction. With the development of technology, blending component sources to expand. For example, from one secondary processing residues or components as well as a variety of industrial oils of the same or different crude oil as a blending component, etc., asphalt, which reduces the production of asphalt in the dependence on oil source selection. With appropriate to create a growing shortage of crude bitumen, bitumen wholesale, tune legitimate show flexibility and economy are increasingly valued and widely used. Super asphalt domestic R & D results May 25, 2014, Chinese troops first third-generation fighter runway test flight on Zheng Min highway. Yangzi Evening Sun Xiaowei interpretation of military experts say, for aircraft taking off and landing runway highway was very strict, and the general standard is not the same highway paved. One key point is that this highway is "material", the top Zheng Min highway paved with a layer of special asphalt concrete improvements. Asphalt, three flat chemicals, asphalt cheap by Chemical Co., Ltd. Jinan three levels. Asphalt, three flat chemicals, asphalt cheap Jinan three ping Chemical Co. (www.sanpinghuagong.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest information Contact: Su Jingli.