陈乐素教授便是最早从事宋史研究的老一辈学者之一。
Prof. Chen Lesu is one of the earliest scholars who started the study.
东升电气有限公司是最早从事五金冲压制品生产研制和生产的企业之一。
Is one of the first engaged in the production of metal stamping products developed and produced one.
辽宁三环树脂有限公司是中国最早从事固体丙烯酸树脂的制造企业之一。
Liaoning Sanhuan Resins Co., Ltd., one of the earliest manufacturers of solid acrylic resin in China, has one of the biggest production bases of this product in China.
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