| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a marker protective sheet having the function as the marker sheet and capable of protecting a buried pipe against a blow from an excavating/drilling attachment of an excavating machine or a drilling machine. <P>SOLUTION: A marker protective sheet embedded underground above a buried pipe comprises a flexible metal core, and a cover sheet having a marker indication unit and integrally fixed so as to cover at least the face side of the core. Therefore, the core of the marker protective sheet installed in a strip shape is deflected but not torn even when a blow is applied manually or by an excavation machine, and the buried pipe can be protected only by the marker protective sheet even under the blow. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
