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After the pce superplasticizer is added to the cement, the sodium aluminate and sodium carbonate in its main components react rapidly with the gypsum in the cement to form sodium sulfate in the alkaline solution, so that the gypsum loses its original…
In the coming weeks, problems with chip production due to a global shortage of neon could start to manifest. Zeno pointed out that if inventories are depleted by April, and chipmakers have no sources in the re…
According to the United Nations website, in the past week, countries reported an 8% increase in new crown cases to the WHO, with more than 11 million positive tests. Tedros noted that although some countries hav…
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