The 3rd National welding skils final competition was held in Daqing[J]. MW Metal Forming, 2009, (20): 4-5.
Citation: The 3rd National welding skils final competition was held in Daqing[J]. MW Metal Forming, 2009, (20): 4-5.

The 3rd National welding skils final competition was held in Daqing

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