Unverified85% confidenceCautionTime unknown
不要用超长铝箔软管硬拉直代替硬管走长距离，软管内壁螺纹凹凸会显著增加阻力（比同径光滑硬管阻力高约40%），长距离必须用硬管
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85%
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Long-term
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