TAT-8 had two operational pairs and one backup pair. Avoid swapping two lines between different pairs. Araneae normally have eight eyes in four pairs. This is different from the distance between the rotational centers of the two wheel pairs. Five is therefore the only prime that is part of two twin prime pairs. There were four gates, each protected by two pairs of quadrangular towers. With two pairs follow the rule for the lower of the two pairs he has. It has overwing exits between the two main front and rear door pairs. Whale sharks have five large pairs of gills. It enabled messages to be easily signaled by holding sets of torches in pairs. The larger, 150,000 base pairs go together to create chromosomes. Claws are absent from both pairs of flippers. Males rarely travel in pairs or trios. Eight pairs of appendages issue from the cephalothorax. Reuleaux called the ideal connections between components that form a machine kinematic pairs.