介绍了尾矿质彩色道板砖研制的整个过程。其中对主要参数的选择、工艺流程的确定、 产品质量及应用前景进行了论述。
The development of colour brick for pavement from tailings is presented. especially selection of main parameters, determination of the process quality of the product and prospect ofthe application.
叙述了一种智能数字电平分析仪的电路原理、各部分电路的信号处理过程以及系统的软件设计，给出了实现本产品所需的主要元器件及它们的主要参数。
The principle of the circuit, the procedure of signal processing in each part of the circuit and the design of system software, in a intelligent digital level analyzer, have been presented in detail.
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