The joint pontes of the front undercarriage of an aircraft is a fatigue critical part, its fatigue life has to be estimated exactly.
某型飞机前起落架后接头连接区为疲劳危险部位，必须准确地估计疲劳寿命。
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This article describes the process, equipment, operating performance and pontes for attention for adding heater and protective device for traditional low-pressure shifting furnace.