also: くろーら
Internet term for a program that systematically browses the web, often used by search engines.
The search engine's crawler is traversing the site.
continuous track; caterpillar track
Mechanical term for the belt-like track system used on tanks, bulldozers, etc. See also 無限軌道.
See also: 無限軌道
The bulldozer travels over rough terrain on its crawler tracks.