1、
Al 2 O 3, and most of MnS inclusions in steel can be modified by injecting CaSi powder.
喷吹CaSi粉可将A_ 2O_3和绝大部分MnS夹杂变性.
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2、
A new intelligent LV switchboard MNS 3.0 series developed by ABB was introduced.
介绍了ABB公司最新推出的MNS3.0系列智能型低压开关柜及其结构特点.
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