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Yanpeng Song
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Shanghai, CN
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last 30 patents
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Patent Grant
Method for manufacturing superior 13Cr thickened drillrod
Patent number
10,329,648
Issue date
Jun 25, 2019
Baoshan Iron & Steel Co., Ltd.
Peng Zhao
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
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Patent Application
METHOD OF MANUFACTURING SUPERIOR 13CR THICKENED DRILLROD
Publication number
20160047019
Publication date
Feb 18, 2016
Baoshan Iron & Steel Co., Ltd
Peng Zhao
C21 - METALLURGY OF IRON