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| °Ë»ç °á°ú ȸé | ||||||||||||
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| ÇÁ·Î¼¼½ºµÈ °Ë»ç °á°ú ȸé | ||||||||||||
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| Detected
signals from a 4.5-in. (114.3-mm)-OD, schedule 80, steel sample when the pipe was filled with air. |
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| And filled with water. | ||||||||||||
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| The configuration fo the pipe sample is shown in. | ||||||||||||