A turning attachment for processing bore hole pump cross head
WANG WEIGANG, LI LING, LUO ZHEN, CHEN LINGQIANG, LIU CHUNWEI, ZHOU XIAOJUN, LIU YONGSHE
Year of Publication 05.08.2015
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Year of Publication 05.08.2015
Patent
Processing method for spatial composite surface of column of pyramid derrick
WANG JUN, WANG WEIGANG, YANG CHUNWU, DU SHUPING, LIU CHUNWEI, LIU YONGSHE
Year of Publication 24.06.2015
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Year of Publication 24.06.2015
Patent
Method for processing curved slots on conical curved surface of driving ring body
WANG JUN, WANG WEIGANG, YANG CHUNWU, LUO ZHEN, ZHOU XIAOJUN, LIU YONGSHE
Year of Publication 17.06.2015
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Year of Publication 17.06.2015
Patent