icdl and engineer skills if you study computer and matlab and see bearing type imagine and bolts oil seal gear and mechanical seal you will know it at real practical and be good engineer i love you too much icdl you study information technology and windows and power point access and internet you will skills that oil leakage mean oil sael failure and leakage liquid due to mechanical seal or stuffing box you will correct write report on word or store data in access or do calculation on excel i am ahmed assem iam enginee from egypt i birth on egypt port said i study on port said university information icdl you know types of computers ram size cpu speedhard disk hard ware i added much pdf file to study carfully icdl windows cut file to move it copy file that file be two act fileseng skills bearing gear mechanical seal oil seal boltsstuffing box all machine has gear box implies oil seal to prevent oil leakage bearing to load shaft gears on gear box belt to transmition motion from motor to shaft i hope you come to learn my course its necessary for all engineering good bye