Overall, the company's performance at the industry level of the middle class.

总体来看, 公司的绩效水平处于行业中等水平.

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This paper studied the manufacture of reagentlevel lithium sulfate monohydrate from industry level lithium carbonate.

本文研究了以工业碳酸锂为原料,制备试剂级一水合硫酸锂的工艺条件.

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