GN is the first China manufacturer who takes equipments to Houston for OTC. There were so many visitors every day. It is interesting that, near all famous solids control brand in US. their people visit GN booth and check GN equipments every day,like Derrick, Swaco, Brandt,Fluids System,Kem-tron.etc…As comptetor, they showed great interest on GN solids control equipments