Unverified82% confidenceDecision RuleTime unknown
钢管管径与壁厚决定承重：直径≥25mm、壁厚≥0.8mm的碳钢管单层可稳定承重15-20kg；壁厚＜0.6mm的薄壁管长期承重易弯曲，选购时可要求商家标注管径和壁厚
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