They master arc, resistance, high-energy beam, and solid-statewelding.
他们掌握电弧，热阻，高能束，和固态焊等。
2
It is proved by fractal theory that the welded state of every micro zone at welded surface is uneven in the formation process of isothermal superplastic solid-statewelding joint.
这也从分形理论的角度证明了在超塑性固相焊接头的形成过程中，焊接面各微区的焊合状态是非均匀性的。
3
Weldability of high alloy tool steels is analyzed, the application of fusion welding, brazing and solid-statewelding in the welding of high alloy tool steels had been summarized.