| 摘要 |
PROBLEM TO BE SOLVED: To provide a burial indication material which is easily arranged in an excavation pit or a temporary pipe laid in the excavation pit and indicates the burial depth of the temporary pipe when the buried temporary pipe is removed.SOLUTION: A burial indication material 1 which is directly or indirectly provided on a temporary pipe P laid in an excavation pit H in an attachable/detachable manner at predetermined intervals has an indication part 3 which is located above the buried temporary pipe P when the excavation pit is covered with the earth and sand, and which indicates the burial depth of the temporary pipe P when excavation is performed. |
