碳钢和低合金钢在污染环境下的大气腐蚀规律。
Atmospheric corrosion of carbon steel and low alloy steel in polluted environment.
该系列焊丝主要适用于焊接低碳钢和低合金钢结构。
The series of welding wires are mainly suitable for welding low alloyed steel structure.
该系列焊丝主要适用于焊接重要的低碳钢和低合金钢构。
The series of welding wires are mainly suitable for welding important low carbon steel and low alloyed steel structure.
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