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