| 摘要 |
An improvement to polyvinyl chloride (PVC) piping that involves printing or otherwise adding markings to the outside of piping to allow for an efficient method of measurement. An improvement to polyvinyl chloride (PVC) piping that involves printing markers for inches and feet along either one or both sides of the pipe to indicate its length. If only one side is used, the inches and feet would increase in number. If both sides are used, the numbers would increase on one side of piping and decrease on the other side.
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