| 摘要 |
A stainless steel tube fittings, or components thereof, are color coded by providing an oxide coating of a different color on one or more of its surfaces, the colored oxide coating having a thickness of <=1000 <img id="custom-character-00001" he="3.13mm" wi="2.79mm" file="US20060191102A1-20060831-P00900.TIF" alt="custom character" img-content="character" img-format="tif"/>.
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