起重机金属结构的强度计算及疲劳分析是十分复杂的问题。
The crane's metal structure intensity calculation and fatigue analysis is a fully complicated problem.
起重机的安全寿命取决于其金属结构的疲劳强度。
Safety life of crane was determined by its fatigue intensity of metal structure.
起重机的安全寿命取决于其金属结构的疲劳强度。
Safety life of crane was determined by its fatigue intensity of metal structure.
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