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aimin,Mudanjiang,Heilongjiang,China China
連絡先担当者 Mr. dean C
住所 aimin, Mudanjiang, Heilongjiang
Product: Drill Pipe, we are selling Drill Pipe Drill Pipe Standard: API 5D Specification: OD: 2 3/8&ac
Product: Oil Drilling Tools, we are selling Oil Drilling Tools Oil tool:drill collar, drill bit, kelly, S
Make up
Drill Collars are the most important parts of drilling string elements. The performance of drill collars will
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