The key of Cu-Al pipe butt welding is to control the welding parameters. In the original control system, all welding parameters were controlled by time-relays.
铜铝管焊接的关键是对焊接参数的控制，原控制系统采用时间继电器控制焊接参数。
Base on the analysis and research of the original control system of double housing planer (B2012A), designed a opposing electromotance feedback control system.
在分析和研究龙门刨(B2 0 12a)原控制系统的基础上，设计了龙门刨床反电动势反馈控制系统。
How to optimize the original control system of risks to control the uncertainties of modem risk has become a challenge to national financial institutions and enterprises.
如何将原有的风险控制系统进行优化，实现现代风险不确定性的控制，已经成为了各国金融机构、企业不断研究探索的一个重要方向。
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