关键词:水源地;水化学类型;硝酸盐污染;影响因素 [gap=1688]Key words:well field;type of chemical component;nitrate pollution;affecting factor
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Polyurethane coated waterproof material is a type of elastic waterproof material solidified in bi-component chemical reaction.
聚氨酯涂膜防水材料是双组分化学反应固化型弹性防水涂料。
The results show that the chemical component of the cuttlebone is CaCO_3 and the crystal type is aragonite.
检测结果发现,乌贼骨的化学组成是碳酸钙,晶型是文石型;
According to the structure of micro bio-chemical analyzer, a new type of mini temperature-controlling system was designed, whose key component was a micro-heater chip made of silicon.
本文针对微型生化分析仪的结构特点,设计并制作了以硅集成加热芯片为核心元件的温度控制系统。
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