The reasons are given why weak carbonizing flame of oxyacetylece is used for heating and why brazing seam area can't be polished.
论证了加热时氧——乙炔焰用微碳化焰的原因及焊缝结合区不能采用抛光的道理。
The reasons are given why weak carbonizing flame of oxyacetylece is used for heating and why brazing seam area can't be polished.
论证了加热时氧——乙炔焰用微碳化焰的原因及焊缝结合区不能采用抛光的道理。
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