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The closure of airspace during the Conflict between Russia and Ukraine has had a serious impact on the aviation industry, according to an analysis by the International Air Transport Association (IATA) released on Tuesday. Flights had to be diverted o…
The use of superplasticizer concrete The use of superplasticizer is an admixture that can greatly reduce the amount of mixing water under the condition of the same slump of concrete. The plasticizer is a kind of concrete admixture that can reduce wat…
Graphene — a two-dimensional carbon film just one atom thick — is an excellent material.…