When the box section design boom and a reasonable cross-section are put in danger of partial reinforcement, the arm can have good stiffness, strength, vibration stability.
当箱型臂截面设计合理且在危险截面处实施局部补强后，可使臂架具有良好的刚度，强度，振动稳定性。
The former includes reasonable man criterion and danger theory criterion and the latter include custom, usage, law and fact self-proving criterion.
前者又可从行为人以及行为的角度分为理性人标准和危险标准；后者又可分为习惯和惯例标准，法律标准以及事实自证标准。
The former includes reasonable man criterion and danger theory criterion and the latter include custom, usage, law and fact self-proving criterion.
前者又可从行为人以及行为的角度分为理性人标准和危险标准；后者又可分为习惯和惯例标准，法律标准以及事实自证标准。
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