big precision welded structure的用法和样例：
- The application of precise welding structure in the gimbals of large-size OE pointing andtracking instrument is described in this paper.
- It is demanding to fabricate crane bridge as large welded structure, so the upgrade to change its span is very challenging.
- The necessary condition in executing the welded structure fatigue life, the basic content and the method are discussed.
- All-steel welded structure, the integrated treatment (VSR, heat) Elimination of internal stress, a very good rigidity and stability.
- This paper mainly expounds four inspection means for three big precision coupling of fuel supply system in diesel engine based on the practice, which can be covered for practical operation.