... can be flexibly moved from top to bottom and stopped at any point.2. Sash Door Glass: 6mm thickness toughened glass, with ... report.* Ceramic switch valve should pass Abrasion-Resistance Rotation Test at least 600,000 times.VIII. Air Supply Fitting1. Air Flow ... .* The ceramic switch valve should pass Abrasion-Resistance Rotation Test at least 600,000 times.Different colour and length of combined ...