| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure capable of specifying a filling water leakage place of a buried gas pipe by boosting gas pressure in a predetermined section. <P>SOLUTION: This specific structure is composed of a stopper of setting the predetermined section as a sealing section by respectively cutting off the predetermined section of the buried gas pipe of an active pipe state on the upstream side and the downstream side, an introducing means for introducing gas in the buried gas pipe inside the sealing section from the upstream side outside of the sealing section and a pump for boosting the gas pressure in the sealing section by pressing the gas outside of the sealing section in the sealing section via the introducing means, and is characterized by specifying a detected gas omission place as a filling water place by inspecting the omission place of the gas from aboveground. <P>COPYRIGHT: (C)2007,JPO&INPIT |
