Unverified80% confidenceDecision RuleTime unknown
购买铁棍山药时可掂重量并观察断面：真垆土铁棍质地密实沉手、断面细腻少空隙；水分大或空心的山药掂起来轻、断面松散多孔，口感差且不耐存
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80%
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Long-term
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