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Shijiazhuang Standard Imp&exp Co.,Ltd.
Extraction of gold from thiourea
The thiourea method is a new non-toxic gold extraction process. This method has been used in China to treat re-election gold concentrates and flotation gold concentrates. However, this process still...
Large-scale production of organic chemicals increased in the first quarter
In China, a large increase in the production of many organic chemicals in the first quarter. According to statistics, the cumulative ethylene production in China from January to March was 2.142...
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