Ungula and ring fracture are due to higher surface hardness.The rational suggestions to settle fracture are put forward.
形和环形断裂由
面硬度偏高造成,并提出解决断裂问题的合理化
议。
；蹄（ungula的复数）Ungula and ring fracture are due to higher surface hardness.The rational suggestions to settle fracture are put forward.
形和环形断裂由面硬度偏高造成,并提出解决断裂问题的合理化议。
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