toughness 

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n. formidability��huskiness��stamina��temper

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1. "People question my toughness, " he said.
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2. High fracture toughness and insulation resistance.
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3. Seamless Copper Tube Material Copper to experts can improve the strength and toughness, in particular, atmospheric corrosion.
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n.
  1. enduring strength and energy
  2. the property of being big and strong
  3. the elasticity and hardness of a metal object; its ability to absorb considerable energy before crac
  4. impressive difficulty

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toughness
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Vitality Toughness
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arrest toughness
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toughness test
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Hobbit Toughness
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