In the presence of phosphoric acid thiophene and acetic anhydride reaction, put the acetic anhydride, 85% phosphoric acid and thiophene into the reaction pot, stir, gradually heated to reflux
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SHUIPO is one of the most professional axle manufacturers in China, specialized in providing high quality products and service. Please feel free to buy or wholesale customized axle at competitive
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Changzhou Yafeir Industry Co., Ltd: Find professional agricultural shade net, garden shade net, outdoor shade net, barrier net, construction safety net manufacturers and suppliers in China here. We
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Sunpro Power Co.,Ltd offers high-quality, high-efficiency, highly cost effective solar panels, we established in 2008 with more than 11 years history, providing excellent service and competitive price
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Xinxiang Ever Great Machinery Manufacture Co., Ltd: As one of the most professional metal sheet machine, slitting machine, speedway guardrail, shelf beam, silo plate manufacturers and suppliers in
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