Unverified78% confidenceDecision RuleTime unknown
锤柄直径应在2-2.5cm、长度12-15cm，符合幼儿虎口抓握；过细的圆柱锤柄（<1.5cm）幼儿难握稳，敲击时锤头易脱手甩出
1
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78%
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Long-term
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