| 1. | To control impedance , maintain trace widths and trace spacing
为控制阻抗，维持一定的线宽与线距。 |
| 2. | Printed boards and assemblies - design and use - generic requirements - generic requirements - controlled impedance
印制电路板及组件.设计和使用.一般要求.受控阻抗 |
| 3. | Printed boards and printed boards assemblies - design and use - part 1 - 2 : generic requirements - controlled impedance
印制电路板和印制电路板组件.设计和使用.第1 - 2部分:总要求.控制阻抗 |
| 4. | Printed boards and printed board assemblies - design and use - part 1 - 2 : generic requirements - controlled impedance
印刷电路板和印刷电路板组件.设计和使用.第1 - 2部分:一般要求.控制阻抗 |
| 5. | Do you perform the impedance test and your capability & frequency ? please describe how to control impedance and retain the coupon sample
是否有做阻抗测试?频率和能力如何?请描述你们怎样控制阻抗和保留的样品 |
| 6. | Printed boards and printed board assemblies - design and use - part 1 - 2 : generic requirements ; controlled impedance iec 61188 - 1 - 2 : 1998 ; german version en 61188 - 1 - 2 : 1998
印制电路板和印制电路板组件.设计和使用.第1 - 2部分 |
| 7. | Do you perform the impedance test and your capability & frequency ? please describe how to control impedance and retain the coupon sample
你们是否能做阻抗测试？测试能力和测试频率如何？请说明如何控制阻抗，如何保存（阻抗）测试条？ |
