Crawlabout

Crawlabouts are small craft used to do maintenance on the exterior of a station. Deep Space 9 had some of these in 2370. Despite their name, crawlabouts do not crawl on the surface. Instead, they have tiny thrusters with a negligible amount of power. 

Based on their description, it is possible that crawlabout is just a nickname for Work Bees or Work Bugs.