... applicability of the performance (such as refineries switch to gas stations, gas production long, drilling crew, etc.) Ex strict ... , punches, chisels, wrecking bars, pinch-bars, screwdrivers, shovels, chain Hoist, etc. 4.The tools can efficiently avoid rising spark ... in explosive atmosphere or flammable vapors such as oil and gas works, petrol-chemical plants, explosive manufactories, mines, shipyards ...