Quartz crystal units for frequency control and selection; part 2: guide to use of quartz crystal units for frequency control and selection; Section one: quartz crystal units for microprocessor clock supply; identical with IEC 60122-2-1:1991
用于频率控制和选择的石英晶体单元;第2部分:用于频率控制和选择的石英晶体单元的使用指南;第一部分:微处理器时钟电源的石英晶体单元;与IEC 60122-2-1:1991相同