Unverified90% confidenceDecision RuleTime unknown
磁力片选购看焊接与封装工艺：优质产品采用超声波熔接封边+ABS一体注塑，磁体完全封闭无缝隙；劣质产品用胶水粘合，摔几次就开裂露出磁体，反而增加吞咽风险
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