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UOE焊管生产
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UOE焊管生产
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工学
焊接钢管生产
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UOE welded pipe process
UOE焊管生产
以厚钢板作原料,经刨边、开坡口和预弯边,先在U形压力机上压成U形管坯,后在O形压力机上压成圆形管,然后预焊、内外埋弧焊,最后扩径的生产工艺。
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chromosomology
chromosphere
chromosphere-corona transition region
chromosphere-corona transition zone
chromospheric ablation
chromospheric activity
chromospheric activity index
chromospherically active binary star
chromospherically active star
chromospheric bubble
chromospheric condensation
chromospheric ejection
chromospheric eruption
chromospheric evaporation
chromospheric facula
chromospheric fine structure
chromospheric flare
chromospheric flocculus
chromospheric knot
chromospheric line
chromospheric material
chromospheric mottling
chromospheric network
chromospheric plage
chromospheric spectrum
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