surface durability

基本解释

Surface Durability: The concept of durability is an important one for all backcountry travelers to understand.
地表的耐久力：耐久力是需要所有野外旅行者懂得的一个重要概念。
The definition formulas and new calculation formulas for transverse load factors of tooth strength and surface durability are proposed.
分别提出了弯曲与接触强度端面载荷系数的定义式和新的计算式。
Surface Durability: The concept of durability is an important one for all backcountry travelers to understand. The following natural surfaces respond differently to backcountry travel.
地表的耐久力：耐久力是需要所有野外旅行者懂得的一个重要概念。以下的自然地表对野外行进有不同的反应。

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