| 摘要 |
PROBLEM TO BE SOLVED: To provide a core for a leak test for obtaining sufficient inner volume reduction effects and high measurement accuracy, without having to change the volume by the inside pressure due to pressure air, by performing the accurate leak test in a short time, and that has high versatility, and easily imitating the shape, regardless of the internal shape of a workpiece. SOLUTION: In the core 10 for the leak test put in the workpiece 1 for reducing the inner volume of the workpiece 1, a plurality of substantially spherical solid bodies are provided as a core element 11 group. The core element 11 is connected in the form of a ball chain via a string-like, linear or a rod-like connecting member. COPYRIGHT: (C)2008,JPO&INPIT
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