Your CD4 count. These cells are a type of white blood cell that is destroyed by HIV. A healthy person's count varies from 500 - over 1,000. If you have fewer than 200 CD4 cells, then your HIV has progressed to AIDS.
Aircraft fluid lines are usually made of metal tubing. or flexible hose. Metal tubing (also called rigid fluid. lines) is used in stationary applications and where long, relatively straight runs are possible. They are widely. used in aircraft for fuel, oil, coolant, oxygen, instru-. ment, and hydraulic lines. Flexible hose is generally. used with moving parts or where the hose is subject. to considerable vibration. Occasionally, it may be necessary to repair or replace. damaged aircraft fluid lines.
There are several types of lines defined by their use. 1  Contour lines are used to define edges. 2  Dividing lines can also define edges, but what distinguishes them from contour lines is they divide space. 3  Decoration lines are used to embellish an object. 4  Gesture lines are quick and rough continuous lines used to capture form and movement.e use lines to organize, connect, and separate information and design elements. You can use lines to convey movement and create texture. Lines provide emphasis and define shape. They can be used to convey mood and emotion. Think of any website and all the places lines are or could be used.