PTN912/910/950的XDSL接口板有SHD4和ADS2类型的单板,它们主要用在PTN网络的用户侧。 A. 对 B. 错 免费查看参考答案及解析 题目: 关于PTN的XDSL特性,以下哪些说法是正确的___ A. PTN盒式设备的XDSL板有ADS2和SHD4,其中SHD4单板有ATM和EFM两种模式 B. PTN盒式设备的ADS2板支持多路绑定的功能 C. PTN的...
P L C 与变频器的连接主要方式有:PLC 的数字量输出信号与变频器的数字量输入信号相连;PLC 的模拟量输出信号与变频器的模拟量输入信号相连。实际应用中,就两者正确连接时应注意问题总结如下。同时,变频器运行时会对周围电气设备产生较强的电磁干扰,为防止变频器运行时对PLC 干扰,两者相连接时应重点考虑的问题总结如...
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For Sale: (6/10/98) 1971 Cub 140 looks like new - new paint (factory yellow/white). 72" woods L306 belly mower, new belts, water pump, radiator cored, new brakes. Excellent mechanical condition, excellent appearance - it's hard to find one like this! Also has 3 pt. hitch, turf...