| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a position of an inflow pipe connection part of a multi-pit widely settable. SOLUTION: In this multi-pit, a rise-up pipe 5 is connected to a rise-up pipe connection part 4 in an invert part 2 protruding an outflow pipe connection part 3 from a side surface and the rise-up pipe connection part 4 from an upper end. Here, a step difference is eliminated in an inner/outer surface of a connection part 12 between the rise-up pipe connection part 4 of the invert part 2 and the rise-up pipe 5, so that an inflow pipe 13A can be connected even in a position of the connection part 12.</p> |
