N-type conductive tin sulfide films for environmentally friendly solar cells has effect on the molybdenum disulfide density market Tin sulfide (SnS) is a kind of abundant, safe and environmentally friendly solar cell material. The cheap material is e…
Application of seal on oil film bearingof rolling mill Oil film bearing is also called liquidfriction bearing. In the process of rolling the mill, liquid lubrication isused to form a complete pressure oil film between the cone sleeve and bushing.The…
French scientists have confirmed for the first time through genome sequencing that the "deltacron" variant of the new coronavirus that has previously attracted a lot of attention does exist, which combines the mutations in the new coronavirus delta v…
Hasad Foods, the agricultural investment arm of Qatar's sovereign wealth fund, said the government would increase its grain reserves from 250,000 tons to 300,000 tons in the near future, which is enough to feed the population for six months. With a…
Prices in the national electricity market averaged $87 per megawatt-hour in the first three months of the year, above the level promised by the federal government. Wholesale electricity prices for industry and large businesses have already exceeded t…