| 摘要 |
PROBLEM TO BE SOLVED: To use from a low temperature medium to a high temperature medium, improve its versatility, evacuate surely, maintain an evacuation over a long term and improve its reliability. SOLUTION: An evacuated material 9 is which the getter material 10 of an activation state which can absorb a hydrogen gas is vacuum-sealed in a glass vessel 11 is stored in a sealed structure, for example the evacuation part 5 of a vacuum insulating pipe 1 and also the evacuation part 5 is substituted and sealed by the hydrogen gas. When the evacuation part 35 is sealed by seal up valves 12, 13 (or after sealed), at least one part of the glass vessel 11 of the evacuation material 5 is destroyed by a destruction tool 42 and the getter material 10 in the glass vessel 11 is exposed in the hydrogen gas.
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