The main way to prevent HIV infection is to reduce the risk of exposure to HIV, for instance by having sex without a condom or sharing needles and other injecting equipment.IV can also be caught from sharing sex toys with someone infected with HIV. See causes of HIV for more on transmission of HIV. The best way to prevent HIV and other sexually transmitted infections (STIs) is to use a condom for penetrative sex and a dental dam for oral sex.
In the Reilly technique, an initial drawing is made of 6 lines, they starts with the head then the torso is placed, then the limbs. A good explanation of this technique can be read on this blog post by Doug Higgins.
A plumbing drawing, a type of technical drawing, shows the system of piping for fresh water going into the building and waste going out, both solid and liquid. It also includes fuel gas drawings. Mainly plumbing drawing consist of Water supply system drawings, Drainage system drawings, Irrigation system drawings, Storm water system drawings. In water supply system drawing there will be hot water piping and cold water piping and hot water return piping also.