Meantime it finds out property change reason of coarse crystal area from welding coarse crystal area structure change and puts forward the direction of toughness.
同时，还从焊接粗晶区组织变化中找出了粗晶区性能变化的原因，并提出了韧化方向。
Meantime it finds out property change reason of coarse crystal area from welding coarse crystal area structure change and puts forward the direction of toughness.
同时，还从焊接粗晶区组织变化中找出了粗晶区性能变化的原因，并提出了韧化方向。
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