... 一次配电干线 primary distribution main ; primary distribution mains 分配总管配电干线 distribution main ; distributing main 使馈电线与配电干线相联的汇接室 junctionbox ...
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Current was the primary factor to affect output, but the in-gas pressure is the main factor to affect the diameter distribution of nanometer iron powders.
电流是影响产率的主要因素，而充气压力是影响粒度分布的主要因素。
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