The strategic material for pneumonia is a mask. What were the strategic materials in World War II?

Strategic materials play an important role in the national economy, people's livelihood and national defense. Including major industrial products, agricultural products and mineral products. According to processing depth, it can be divided into raw materials, materials, semi-finished products and finished products. Not only masks, but also protective clothing. The following are some strategic materials needed in World War II.

Oil-the first and most important thing is oil. The Frenchman Kerry Duhamel Du Monceau said two very vivid words: "France cannot be short of oil for a moment." "In the future war, oil is as indispensable as blood." Oil is the prerequisite for ensuring mobile operations and transporting materials.

Tung oil-can be used as paint on weapons and equipment for gun maintenance, so that it will not rust, conduct electricity and be corroded. It can also be used as a reserve of wartime medical materials for medical research and development. It is a clear oily liquid with special smell extracted from tung oil seeds. There are several major tung oil producing areas in China, Yunnan is rich, followed by Sichuan, Hunan, Hubei and other provinces, most of which are produced in rural areas of these provinces.

Platinum-platinum is very important in the military, because it is a good catalyst with high melting point and has strong oxidation resistance, so it is also widely used in the military field, such as making submarine shell coatings, electronic pulse regulators, radar stations and other electronic devices as electron tube filaments and so on.

Bristle-Before the invention of nylon, bristle was an important raw material for industrial and military brushes. Regardless of the army or navy, after the artillery is fired several times, it is necessary to brush the barrel with a brush to remove the residual copper, powder burning residue and other dirt in the barrel, so as to improve the accuracy and avoid corrosion of the barrel or explosion accidents. The best brush material is a hard brush (metal brushes can damage the rifling).

Others include tungsten sand, antimony sand, chrome ore, industrial platinum and other metallic mineral materials.