电弧 定义：由焊接电源供给的，在两极间产生强烈而持久的气体放电现象—叫电弧。
... surface resistivity [电]表面电阻率 electric resistivity 电阻率；电弧率 specific resistivity 比电阻，电阻率 ...
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作为评价触头的性能，不能单一地比较其燃弧时间的长短，尚应全面评价其分断电弧能量和材料侵蚀率。
When we evaluate the property of contact materials, we should not only compare thier arc time, but also compare thier erosion rate of materials and arc energy.
提高电弧炉炼钢生产率主要基于以下几项新技术，包括改善电弧炉电效率、强化供氧技术、 智能控制技术（ 专家系统）等。
The primary new technologies that improve the productivity of EAF mainly include EAF power input technology, oxygen input technology and EAF intelligent control technology(expert system).
近几年来， 电弧炉炼钢生产率有较大的提高。
The electric arc furnace steel-making productivity has gained rapid progress in the recent years.
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