[KongchangAI]
Unverified85% confidenceSolutionTime unknown

选购前先用磁铁+敲击法确认墙体类型:敲击声空洞多为石膏板/空心砖,声音沉实为实心墙;据此再匹配固定方式和承重预期,是搁架选购的第一步

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