A specially-designed mode of transport for conveying liquid and gas is a

A specially-designed mode of transport for conveying liquid and gas is a "tanker". A tanker is a type of ship or vehicle designed to carry large quantities of liquid or gas cargo, such as oil, natural gas, or chemicals. Tankers are designed to safely transport their cargo, which is often hazardous or flammable, over long distances across the sea or land. Tankers are designed with special features to prevent leakage or spillage of their cargo. For example, oil tankers have double hulls to prevent oil spills in the event of an accident or collision. Tankers also have special pumps and pipelines for loading and unloading their cargo. In summary, a "tanker" is a type of specialized transport designed to safely transport large quantities of liquid and gas cargo, such as oil and natural gas, over long distances.