TRANS CAL 7281 MOBILE HIGH-PRECISION CALIBRATOR AND TESTING DEVICE FOR MECHANICAL AND ELECTRICAL MEASUREMENTS TRANS CAL 7281 MOBILE HIGH-PRECISION CALIBRATOR AND TESTING DEVICE FOR MECHANICAL AND ELECTRICAL MEASUREMENTS TRANS CAL 7281 MOBILE HIGH-PRECISION CALIBRATOR AND TESTING DEVICE FOR MECHANICAL AND ELECTRICAL MEASUREMENTS TRANS CAL 7281 MOBILE HIGH-PRECISION CALIBRATOR AND TESTING DEVICE FOR MECHANICAL AND ELECTRICAL MEASUREMENTS