| abstract |
PROBLEM TO BE SOLVED: To purify water efficiently and prevent deterioration of a pipe, a water pipe that can be used in a wide flow velocity range without causing a pressure loss of a water pipe, etc. In getting a pipe. [MEANS FOR SOLVING PROBLEMS] A pipe body such as a water pipe or a water supply pipe, and a mixture of powders such as tourmaline ore or granite having a far-infrared effect or negative ion effect, or a carbon particle powder formed on the inner surface of the pipe body. The mixed layer constitutes a pipe such as a water pipe. [Selection] Figure 1 |