. "pan scraper" . "Wheel tractor" . . "Scrapers" . . "earthmover" . "Yard scraper" . "wheel tractor-scraper" . . . . "tractor" . "towed scrapers" . "scrapers" . "Tractor" . . "Wheel tractor-scraper" . . . . . "tractor-scraper" . . "Wheel type Tractors" . "Scraper" . . "motor scrapers" . "Wheel tractor-scraper" . . "scraper" . . .