Kara na kushekar daidaiwa daga sale suna aiki mai shawarwar rubutuwa don alam jarin wani aikin da fatan rubutuwa. Suna kasance ne daga cikin wannan, hanyar rubutuwa, da idanun bayyana, an yi amfani daidaiwa don tsaye rubutuwar gabatarwa, dai dai gasolin, diesel, da rubutuwa na jirgin samani. An yi amfani da materialain gaba mai sauran, mai steel ko stainless steel, daidaiwan rubutuwa an yi amfani don bata mafiya da rubutuwa. Hanyar hankali, mai double-hulls, emergency shut-off valves, da leak-detection systems, suna standard. Don karar daidaiwa na rubutuwa, an yi amfani don zama aiki da equipment mai sauran ga zuwa kuma yanzu da suka iya fitowa masu hankalin da masu hadin kasance, don kira rubutuwar market daidaiwa na rubutuwar distribution, kuma don yi amfani daidaiwa na rubutuwa mai sauran.