Vein bursting is a common condition. I would recommend that you discuss this with your doctor as it may be a a sign of an underlying disorder that requires treatment. First of all, everyone occasionally experiences veins bursting. This results in an ecchymosis, or a bruise.
Couplings & Flexible Shafts. Couplings are devices used to connect two shafts together and are divided into two categories: Rigid and Flexible. Both are used for the purpose of transmitting power, rigid couplings being more limited in applications as compared to flexible couplings.
Mutual gaze is first and is just staring at each other. Gaze coupling is next, alternations of looking at each other and something else (like in conversation) Deictic gaze, babies or caregivers point with their eyes and the other follows the line of site, allows for joint reference.