pipe bend

• 弯头,肘管弯头

pipe bend的用法和样例：

例句

1. This paper presents a method to manufacture pipe elbows by hydro-bulging a tubular single-curvature polyhedron.
   介绍了一种利用管状单曲率多面壳体液压胀形制造薄壁管道弯头工艺方法。