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C/2502-3Y-STD
C/2502-3Y-STD,Keithley Instruments, Inc.,科微杰电子,校准、保修与服务计划 KEITHLEYCARE 3 YR STD CALIBRATION PLAN
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C/2502-3Y-DATA
C/2502-3Y-DATA,Keithley Instruments, Inc.,科微杰电子,校准、保修与服务计划 KEITHLEYCARE 3 YR CALIBRATION W/DATA PLAN