中国石化工程建设公司和北京燕山石化公司建筑安装公司联合攻关研制。

China petrochemical construction company jointly with Beijing Yanshan petrochemical company, construction and installation company tackled key problems.

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因此，中国石化工程建设公司于2002年重新绘制了工程图，并将其命名为《U形管式换热器系列工程图》。

Then SINOPEC engineering incorporation drew up the engineering drawing a-gain in 2002, and it was named as 《U shape tubular heat exchanger series engineering drawing》.

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因此，中国石化工程建设公司于2002年重新绘制了工程图，并将其命名为《U形管式换热器系列工程图》。

Then SINOPEC engineering incorporation drew up the engineering drawing a-gain in 2002, and it was named as 《U shape tubular heat exchanger series engineering drawing》.

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