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A kind of cold expanding dedicated anti-necking formed punch of line pipe
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A kind of sand blasting system quick-replaceable abrasive material auxiliary body
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A kind of gathering line stainless steel connection structure
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316 stainless steel tube epoxy powder inner coating process
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The oil exploitation drilling rod and manufacturing method that wear-resistant strip is welded with inner coating and heap
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A kind of 360 degree of sandblasting spray heads
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A kind of internally coated manufacture craft of surface line ultralow temperature
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One kind being used for the internally coated spray equipment of oil tree shaped piece
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Valve group inner coating spraying method on a kind of oil field petroleum conveying pipeline
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