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Application
Oil Pipeline
Petrochemical 1
Petrochemical 2
Petrochemical 3
Petrochemical 4
Oil Transportation
Water Conservancy
Metallurgy 1
Metallurgy 2
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Sponsor:Yingkou Haitai Metal and Pipe fittings Co., Ltd
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Technical support: Yingkou Aisida (ratified Jianzhan units)
