液体窒素
Feb
2
その用途は水道管の一時的な断水
新設の水道管と既設の水道管との接続時
既設水道管の周りに流し込み凍結させ断水し切断
そして接続します
素肌に付着すると凍傷になります
Wikipediaでは
液体窒素は輸送可能な窒素ガスの供給源である。
水の凝固点を遙かに下回る低温を維持することができ(液体窒素の沸点は77 K, −196 ℃, −320 °F)、おもに使い切りの冷却剤として様々な用途に利用されている
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