Inter-dune lake sediment cores are ideal and unavailable materials for study climate and environmental changes of arid region.The precious dating of lake sedime
NiCoCrAlY/ZrO2 coatings were obtained by cold spraying.Nitrogen gas was used as processing gas(750℃,3.8 MPa).The corrosion electrochemical behavior of the coat
CAD model with nominal dimension is implemented in interference checking of assembly simulation of aircraft complex parts at present,which causes inadequate ava