ADDENDUM (a) is the height by which a tooth projects beyond the pitch circle or pitch line. BASE DIAMETER (Db) is the diameter of the base cylinder from which the involute portion of a tooth profile is generated. BACKLASH (B) is the amount by which the width of a tooth space exceeds the thickness of the engaging tooth on the pitch circles. As actually indicated by measuring devices, backlash may be determined variously in the transverse, normal, or axial-planes, and either in the direction of the pitch circles or on the line of action.
If you cannot find any of your Word, Excel, PPT or other Office files on your Mac, you might have met file loss situation. But don't lose your hope, if your action is fast, uFlysoft Mac Data Recovery Tool can help you to recover the lost files on your Mac no matter what reasons make the files loss problem happen.f you cannot find any of your Word, Excel, PPT or other Office files on your Mac, you might have met file loss situation. But don't lose your hope, if your action is fast, uFlysoft Mac Data Recovery Tool can help you to recover the lost files on your Mac no matter what reasons make the files loss problem happen.
Simple steps to perform MacBook documents recovery: Step 1: Download and install the Document Recovery Software on your MacBook. Run the software and select  Recover Files  from the main page. Then select  Recover Deleted Files  or  Recover Lost Files  from the next screen.ou can save lots of files on the Mac hard drive. The hard drive is further divided into volumes to make data management easy. You can store various files in it like documents, excel sheets, database files, etc. The files on the MacBook is deleted or lost at times. Nothing can stop what is meant to happen.