That introduced the technological process and characteristic of the PVC/SBS general character producing corrugated casing - line pipe.
介绍了聚氯乙烯与丁苯热塑弹性体共混改性生产波纹套线管的工艺过程。
Analyses problems of boiler regularity blow down control system which is controlled by relay, describes control process and characteristic of the system using PC.
分析了利用继电器实现锅炉定期排污控制系统存在的问题，阐述了采用PC机改进后的该系统控制过程及特点。
This article illuminates the process and characteristic of double-wire MAG welding from requirements of welding machine, gas, metal transfer control and welding process.
从其焊接设备的要求、 保护气体以及其熔滴过渡控制、焊接过程等几个方面，详细介绍双丝MAG焊的工艺及其特点。
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