Unverified78% confidenceFactTime unknown
半硬质铝箔管（可拉伸压缩）压缩状态长约0.5-1米、拉伸后可达2-3米，方便预留检修余量，但不宜过度拉伸至无褶皱，会失去弹性且拉伸后管壁变薄
1
Sources
78%
Confidence
Long-term
Relevance
-
First Seen
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