For all operators in this unit group, completion of secondary school is usually required.
对于本单元组的所有运营商，通常需要完成中学。
Many designers and operators require such paint on their secondary reformer shells .
有些设计者和操作者需要在二段转化炉外壳涂以此种油漆。
It is very convenient for the field operators and can be used as a secondary meter in mining industry, the petroleum chemical industry, the metallurgical industry.
该仪器体积小、功能强、精度高，可以广泛适用于电力系统及相关行业继电保护和计量专业、工矿企业、石油化工、冶金企业的二次回路检查。
It is very convenient for the field operators and can be used as a secondary meter in mining industry, the petroleum chemical industry, the metallurgical industry.
该仪器体积小、功能强、精度高，可以广泛适用于电力系统及相关行业继电保护和计量专业、工矿企业、石油化工、冶金企业的二次回路检查。
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