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.
U.S. Government Civilian Employees Working Overseas. If you are a U. S. citizen working for the US Government, including the Foreign Service, and you are stationed abroad, your income tax filing requirements are generally the same as those for citizens and residents living in the United States.