Last Updated:2025/11/29

The antique pear gauge on the laboratory bench clearly showed the receiver's exhaustion after several strokes of the pump.

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The antique pear gauge on the laboratory bench clearly showed the receiver's exhaustion after several strokes of the pump.

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研究室の作業台に置かれたその古い洋梨形の真空計は、ポンプを数回動かした後の受器の排気状態をはっきり示していた。

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