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Documents Toric lenses and soft CL problems. Toric Lens Lenses used to correct astigmatic/sphericocylin...

Slide 1Toric lenses and soft CL problems Slide 2  Toric Lens  Lenses used to correct astigmatic/sphericocylin drical patients.  Toric lenses have a ballast or “weight”…

Documents Elements of Railway Tracks

ELEMENTS OF RAILWAY TRACKS: ELEMENTS OF RAILWAY TRACKS: A railway track is a combination of · Formation · Ballast · Sleepers · Rails · Fastenings A railway…

Documents ELEMENTS OF RAILWAY TRACKS. A railway track is a combination of 1. Formation 2. Ballast 3. Sleepers....

Slide 1 ELEMENTS OF RAILWAY TRACKS Slide 2 A railway track is a combination of 1. Formation 2. Ballast 3. Sleepers 4. Rails 5. Fastenings Slide 3 1. FORMATION The surface…