| 摘要 |
PURPOSE: To realize forming of a joint for probing through insert molding without destroying a resonance body. CONSTITUTION: A joint for probing contains a connecting opening 10 into which the end of a buried pipe can be inserted or fitted and in which a heat coil 11 and a resonance body 13, which is connected in parallel to the heat coil 11, are buried, while a terminal pin 12 connected to both ends of the heat coil 11 is provided so that it can be connected to a power source and the resonance body 13 is stored in a protection body 14 which can protect the resonance body 13 from pressure and heat. |
