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truck (1300)
car (228)
station (226)
poster (197)
aircraft (144)
service (115)
gas (112)
wrecker (101)
ad (90)
military (73)
bus (45)
steamship (41)
airline (36)
auto (33)
sign (24)
gasoline (17)
railroad (16)
ship (14)
building (11)
misc (10)