The camshaft. The valve train consists of the valves and a mechanism that opens and closes them. The opening and closing system is called a camshaft. The camshaft has lobes on it that move the valves up and down, as shown in Figure 5. Most modern engines have what are called overhead cams.
A Foreign Service Officer (FSO) is a commissioned member of the United States Foreign Service. As diplomats, Foreign Service Officers formulate and implement the foreign policy of the United States.
Working in the US. The United States welcomes thousands of foreign workers in multiple occupations or employment categories every year. These include artists, researchers, cultural exchange participants, information technology specialists, religious workers, investors, scientists, athletes, nurses, agricultural workers and others. All foreign workers must obtain permission to work legally in the United States. Each employment category for admission has different requirements, conditions and authorized periods of stay. It is important that you adhere to the terms of your application or petition for admission and visa.