The average molecular weight of polyoxytetramethylene glycol could be flexibly controlled by varying the...
未反应的四氢呋喃经适当处理后可以回收循环。
The average molecular weight of polyoxytetramethylene glycol could be flexibly controlled by varying the...
未反应的四氢呋喃经适当处理后可以回收循环。
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