There are two ways to tell if the timing belt has been replaced. One is obvious-you are looking at a service receipt showing the replacement.
Swimlane diagrams are used whenever you need to show activities, tasks, or process steps which are being performed by different actors/roles. You can use swimlanes to group activities in an activity diagram or process flow by any category what you need: by role, by system, by department, etc.
Swim training, like other forms of physical activity, results in some basic changes in human physiology, which increases how efficiently the human body uses oxygen. Primarily, at the cellular level the size and number of Mitochondria1 increase with high-intensity endurance training.