Unverified90% confidenceDecision RuleTime unknown
厨房刀具钢材硬度用HRC洛氏硬度衡量，家用刀具HRC 56-58为平衡点：低于55易卷刃需频繁磨刀，高于60虽保持锋利久但脆性大易崩口且难自行打磨
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