Unverified85% confidenceDecision RuleTime unknown
管径适配要看内径而非外径,橡塑管套标称规格(如φ22、φ28)指内径,须与管道外径匹配。铜管/PPR管外径不同,选购前需实测管外径,套小了绷裂套大了留空气层降低保温效果
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