Method for treating inner and outer walls of oil pipe before coating of anti-corrosion coatings
The invention belongs to an oil pipe wall surface treatment process, and in particular relates to a method for treating inner and outer walls of an oil pipe before coating of anti-corrosion coatings.The method comprises the steps of A. treating the outer wall surface of the oil pipe (cleaning and sh...
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Format: | Patent |
Sprache: | chi ; eng |
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