以下为句子列表：
英文: Hundreds of the company's leading products, such as water supply control facilities, air conditioning pump and fan energy control equipments which are based on variable frequency control system, have been used in the civil, fire-protecting and mining area
中文: 公司主导产品-变频/工频供水控制设备，空调水泵变频节能控制设备，风机变频控制设备-在民用、消防和工业领域，运行数百台套，得到了用户广泛好评。
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英文: This controller is based on single-chip microcomputer AT89C51, and it can realize automatic welding, line voltage compensation, welding current and voltage display through the combining of constant current and voltage supply control with varied sets of st
中文: 该控制器以AT89C51为控制核心，在恒压和恒流控制结合的基础上可实现钢筋网焊自动化，并具备网压补偿、焊接电流电压显示、多套规范参数存储、故障自诊断及系统自保护等功能。
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