Building and mining machines and their components, particularly, mining/winning machines, namely, coal plows, coal augers; machines for loading and/or transporting mining products and other bulk materials, particularly, earth moving machines, namely, back hoes, graters, loaders, scarpers and scrapers; conveyors, namely, continuous conveyors for bulk material, particularly, scraper chain conveyors, namely, curve conveyors and roller curves, belt conveyors, platform conveyors, link conveyors, p...