Prevention of infectious diseases ppt courseware-Beijing Normal University version seven courseware

2013 Spring North Normal University Edition Seventh Section 2 "Prevention of Infectious Diseases" ppt courseware In 1348, a plague outbreak occurred in Europe. In just 5 years, the European population decreased by nearly 1/2. In 1918, the global outbreak of influenza caused 20 million deaths, including 500,000 deaths in the United States, more than those killed by war. In the spring of 2003, "atypical pneumonia" (SARS) appeared in southern China, causing nearly one million people to be infected and nearly one thousand people to die. The "avian influenza" that spread throughout the country in 2006 was caused by the mutation of the H5N1 coronavirus. The total loss of poultry by killing, burning and burying poultry nationwide exceeded 100 million yuan. Some time ago, the outbreak of "avian flu" made everyone dare not eat chickens and made people panic.

Handmade Tattoo Machine

Tattoo Machine is a hand-held device generally used to create a tattoo, a permanent marking of the skin

with indelible ink. Modern tattoo machines use electromagnetic coils to move an armature bar up and down,

Connected to said armature bar is a barred needle grouping that pushes ink into the skin. Tattoo artists generally

use the term "machine", or even "iron", to refer to their equipment. The word "gun" is often used but many

tattoo professionals dislike it. Then there are the Tattoo machines which are available at the numerous Tattoo

Supplies stores. These are also known as Tattoo Guns. There is a vast selection of stylish tattoo guns which are

made out of Iron, Copper steel and Top carbon steel and they are designed for lines and shading of the intricate

design on the Tattoo. Then you get the Tattoo Needles of different sizes and shapes enclosed in individual

envelopes.They carry nearly everything a tattoo operation demands or even needs as well at truly competitive prices

for quality items.

Handmade Tattoo Machine, Handmade Rotary Tattoo Machine, Handmade Carbon Steel Tattoo Machine

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