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1990年6月近2500位来宾到会庆祝长年钻探公司建立100周年。C·Evon Wayne简要指出了该公司对世界地质钻探事业的贡献。
Nearly 2,500 guests came to celebrate the 100th anniversary of the establishment of a long-term drilling company in June 1990. C · Evon Wayne briefly pointed out the company’s contribution to the world’s geological drilling.