The company produces automobiles, buses, electric bicycles, forklifts, rechargeable batteries and trucks. Heavy lifting is done by machines such as overhead cranes or forklifts. Starting in the late 1980s, SHI produced forklifts and heavy equipment (mainly excavators) at Changwon. Materials on pallets are handled with forklifts. The most prevalent fuel cell vehicles are cars, buses, forklifts and material handling vehicles. Manufacturers of marina forklifts include Wiggins, Hoist, and Toyota. Manufactures various kinds of chains for conveyors, forklifts, and other purposes. These are similar to the batteries found in older forklifts and vintage electric golf carts. The vehicles were distributed by Toyota Tsusho Thailand, the importer of Toyota forklifts. Asami can also pilot airships, and operate other machinery such as motorboats, sand-sailers, and forklifts. All operators should be trained and certified to ensure that they operate forklifts safely. Electric forklifts are primarily used indoors on flat, even surfaces. For example, optimum routing is a big efficiency issue for forklifts in large warehouses. One in five forklifts sold in the U.S.A. is a Toyota. Most fuel cells used in forklifts are powered by PEM fuel cells.