Oil derivatives are the dominant source of fuel for transportation systems. You have probably seen news coverage of “hydrogen” and “electric” powered vehicles, but these sources are still very much in their infancy. Gasoline is the primary fuel source for cars, trucks, and other passenger vehicles, but regular gasoline systems are not the only systems available. Diesel systems are the preferred types for commercial vehicles, cargo ships, and trains. http://www.yey-business.com/diesel-engine/diesel-engine-accessories/

The paper cup machine is a kind of paper container made by mechanical processing and bonding of the base paper (white cardboard) made of chemical wood pulp. With the characteristics of safety, health, lightness and convenience, it is an ideal equipment for public places, restaurants and restaurants. The equipment has a heating station to heat the PE film on the surface of the PE-coated paper and compact it through the side and bottom pressing mechanisms. http://www.newsmart-machine.com/paper-cup-machine/

From its very inception, the ballpoint was specially designed for the purpose of practicality and convenience. The ballpoint as we know it was born in the 1930s when László Bíró noticed that ink used in newspapers dried immensely faster than that used in fountain pens. He subsequently set out to design a pen that could support this type of ink, creating the ballpoint pen. A few decades later, The Parker Pen Company released the now world-renowned Parker Jotter, http://www.cnluckstar.com/plastic-ballpen/retractable-plastic-ballpen/