U.S. refiners forecast strong first-quarter earnings as margins on gasoline and diesel sales improved, refining capacity fell sharply and crude supplies tightened due to the Russia-Ukraine war.Global refining capacity has declined amid the coronaviru…
In international trade, the indirect and local inspection of import and export commodities is closely related to the vital interests of buyers and sellers, as it involves inspection rights, inspection agencies and related claims.…
The wide-gap semiconductor material GaN is widely used due to its excellent electrical, optical and physical properties. 1.Semiconductor light Gallium Nitride is widely used in semiconductor lighting. The high luminescence and high reflectivity of ga…