A kind of simple die structure which can realize the re-drawing of barrel-shape parts is introduced, which can be referenced by similar parts manufacture.
介绍了一种实现筒形类零件二次拉伸的简易模具结构，为类似零件的生产制造提供参考。
2
They're looking for a change known as "barrel chest," which describes a particular posture and body shape that tends to develop as a secondary symptom of COPD.
Why? They're looking for a change known as "barrel chest, " which describes a particular posture and body shape that tends to develop as a secondary symptom of COPD.