搜索 - 科创

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管型TYPE结构类别STRUCTURE灯丝FILAMENT外形尺寸PHYSICAL DIMENSION最大额定值MAX RATING电压(V)VOLTAGE电流(A)CURRENT最大高度(mm)MA...

引用第9楼dctyu于2011-03-13 13:16发表的 :千言万语不如科学怪人一句话：“由于载波频率远高于‘有用信号’所以前后不同的信息不会混叠在一起。”还请问‘有用信号’的最大频率怎样确定。...

引用第25楼虎哥于2011-06-06 03:40发表的 :事实上，电磁继电器在火箭和卫星中广泛应用。磁保持继电器具有非动作时不耗能，通态电阻接近于0，断态电阻接近于无穷，抗宇宙射线等特点，这方面没...

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