[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

承重需求场景选钢珠/滚珠轴承结构,其承重可达5-8kg且转动顺滑度衰减慢;塑料轴心结构长期放重物易磨损卡顿,仅适合放调料等轻量物品(<2kg)

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