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7709-5Y-EW-STD
7709-5Y-EW-STD,Keithley Instruments, Inc.,科微杰电子,校准、保修与服务计划 5 YEAR KEITHLEYCARE EXTENDED WARRANTY
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7709-3Y-EW-STD
7709-3Y-EW-STD,Keithley Instruments, Inc.,科微杰电子,校准、保修与服务计划 3 YEAR KEITHLEYCARE EXTENDED WARRANTY