| 摘要 |
An objective of the present invention is to clearly distinguish, with a simple manipulation, the flow performance of a joint or pipe body which is a subject of comparison. By supplying a fluid (4) from containers (3) of a plurality of sets of pipe units respectively (B1, B2) toward comparison subjects which are either joints (2a, 2b) or pipe bodies (1a, 1b) which have different transmission resistance, a difference arises in the remaining quantity of the fluid (4) in the containers (3) according to the differences in the transmission resistance of the joints (2a, 2b) or the pipe bodies (1a, 1b), and by viewing the remaining quantity difference with a see-through means (3a) of the containers (3), the flow performance of the joints (2a, 2b) or the pipe bodies (1a, 1b) is simultaneously apparent and easily compared. |
