Special area of yellow sand oil field delivery pump is taken out in mine
The utility model discloses a special area of yellow sand oil field delivery pump is taken out in mine, including the area body, the area body is including inlayer, enhancement layer and skin, the enhancement layer is located and links to each other between inlayer and the skin and through glue, the...
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Format: | Patent |
Sprache: | chi ; eng |
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