The meter is devided into two parts: the primary meter (detector) and the secondary meter.
该仪器分为一次表（探头）和二次表两部分。
The working principle of the vibration-type water mud densimeter is dis-cussed in our paper. It guided the design of the variator and the secondary meter.
本文分析了振动式水泥浆密度计的原理，指导了变送器和二次仪表的设计。
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。
All of them can be used as secondary standard Rontgen meter and in protection dose measurement.
上述电离室可作次级标准伦琴计和防护剂量测量用。
This several thousand meter long ground net can not only resist the sand in the primary-harm wind direction but also guide the sand in the secondary-harm wind direction.
这道延伸数千米的地网既能在主害风向上阻沙，又能在次害风向上导沙。
This several thousand meter long ground net can not only resist the sand in the primary-harm wind direction but also guide the sand in the secondary-harm wind direction.
这道延伸数千米的地网既能在主害风向上阻沙，又能在次害风向上导沙。
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