In metal works fabrication filed, we always hear many welding technology.
At OPENEX - a China custom fabrication service supplier - we can bend sheet metal as well as roll form numerous profiles into just about any shape.
We are large vertical boring milling manufacturer in China.
Here pictured is a job of 4 units of vent stake used for a compressor station in petroleum transmission pipeline，each size at Out diameter of 1.1m，Height of 30m， and weights at 14tons.
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