GeneralElectricのインスタグラム(generalelectric) - 11月28日 01時12分

As the smallest and lightest noble gas, helium can escape from even the smallest of holes. At the vacuum chamber, Johnny operates an ultrasonic detector specially-designed to detect micro-cracks in the magnet’s casing, because no one likes when gas accidentally escapes from a crack #HeHeHe. Photo by @seenewphoto.

[BIHAKUEN]UVシールド(UVShield)

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