Inquiry (采购产品): 830R20 I have 2 of the above (Subject) mentioned models. One has a Starrett indicator and the other has an AMES indicator. Our customer states that they are for Tension. Can you supply any info or instructions for the calibration of these items. **** Hidden Message ***** Rick Schuch 7007 SE Lake Road Portland, OR 97267 USA Company: JJ Calibrations, Inc. Title: Supervisor Phone: 1-503-786-3005 Fax: 1-503-786-2994 E-mail: ricks@jjcalibrations.com **** Hidden Message ***** ricks@jjcalibrations.com