| 摘要 |
A pipe identification system using marking collars which indicate the contents of a pipe and/or the direction of fluid flow. The pipe contents may be indicated by the color of the marking collar or by symbols marked on the collar. Fluid flow direction may be indicated by arrows which may be raised and colored a different color to the base of the marking collar. The marking collars may be easily attached or removed and are suitable for rapidly marking pipes during a hazard situation.
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