航空产品研制过程中通常用工艺余量来补偿装配累积误差，不合理的余量将导致装配效益低下。
Usually, process allowance is used to compensate assembly error's stack-up in the process of aero-product's development. But improper allowance may affect assembly-benefit.
通过采用预留收缩余量和反变形量，钢性加固，合理选择焊接方法，调整焊接顺序等措施保障了产品焊接最终质量。
In the manufacturing of gate, we use many welding deformation control techniques and adjust the welding sequences to guarantee the final welding quality of gate.
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