422 The welding (heat treatment )of pipes have been carried out with incorporated programming.
422 The welding (heat treatment )of pipes have been carried out with incorporated programming.
管子的焊接（热处理）现已按照编写的程序完成。
422 The welding (heat treatment )of pipes have been carried out with incorporated programming.
管子的焊接（热处理）现已按照编写的程序完成。