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707B-5Y-EW
707B-5Y-EW,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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707B-3Y-EW
707B-3Y-EW,Keithley Instruments, Inc.,科微杰电子,校准、保修与服务计划 3 YEAR KEITHLEYCARE EXTENDED WARRANTY