This article introduces the erosion and abrasion of hydraulic structures and the affection of toughness epoxy resin resistance to erosion and abrasion of the concrete.

A powerful drawing-thickening technology was prompted for double-cup-shaped workpieces, it combined the characteristics of cold extrusion with drawing process.

In the piedmont belt of Washixia sag developed thrust nappe which leaded to incrassation of Jurassic source rocks, being favorable for hydrocarbon accumulation in this area.