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August 28, with the Coal Bin, chief engineer at the regular meeting hosted technical work.
8月28日，同煤集团总工程师于斌主持召开技术工作例会。
youdao
-
August 28, with the Coal Bin, chief engineer at the regular meeting hosted technical work.
8月28日，同煤集团总工程师于斌主持召开技术工作例会。
youdao