Chinese Journal of Lasers, Volume. 20, Issue 11, 861(1993)
Investigation on welding technique for the valve chamfers of internal combustion engines
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Investigation on welding technique for the valve chamfers of internal combustion engines[J]. Chinese Journal of Lasers, 1993, 20(11): 861