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Description: Threads on ends are particularly liable to damage by rough handling, even though "thread protectors" are fitted. Threaded ends so damaged may be cut and rethreaded in the oilfields, where special machinery is usually available. Bends and dents, if not too severe, may also be straightened, but, as oil well casing is subject to high pressure, such repairs must be tested and inspected by technical processes which are expensive.
Index: 534
Commodity Name: OILWELL CASING

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