Under what circumstances may a chemical or biological terrorist attack occur? The Anti-Terrorism Bureau of the Ministry of Public Security issued the "Citizens' Handbook for Preventing Terrorist Attacks" to give answers.
Vitrified Grinding Wheels mean grinding
wheels in ceramic bonded. Vitrified grinding wheels can be superabrasive
grinding wheels like diamond grinding wheel or CBN Grinding Wheels. It also can
be abrasive grinding wheels such as white aluminum oxide grinding wheel,pink
grinding wheel,silicon carbide grinding.
Vitrified grinding wheel is only one type
of bond, which is ceramic, it can be in any type of abrasive.
The main ingredient of vitrified bond
are vitreous material with low melting point, such as borosilicate glass, lead
glass, etc.It is widely used in various grinding methods such as outer
circle, inner circle, flat surface, centerless, etc. It is the most commonly
used bonding agent for abrasive tools.
Vitrified bond is characterized by
high chemical stability, almost can work in a variety of cooling media,
small elastic deformation, brittle, can be made into a variety of hardness
levels of grinding tools to adapt to the processing of various hardness of the
workpiece. Vitrified bond has good self-sharpening.
The grinding efficiency of single crystal
diamond with vitrified bond grinding wheel is higher than metal bond
grinding wheel. The wear ratio is very small and the processing cost is
low. Therefore, the grinding efficiency of single crystal diamond with ceramic
bond grinding wheel can be greatly improved.
Vitrified Grinding Wheels,Vitrified Wheels,Vitrified Diamond Wheel,Vitrified Bond Grinding Wheel Henan Jinlun Superhard Material Co., Ltd , https://www.jlsuperhard.com
A chemical terrorist attack may have occurred: unusual smells, such as garlic, spicy, bitter almond, etc .; unusual phenomena, such as a large number of insect deaths, unusual smoke, unusual changes in plants, etc .; unusual feelings, general conditions When people are attacked by chemical poisons or chemical poisons, they will experience different degrees of discomfort, such as nausea, chest tightness, convulsions, rashes, etc .; abnormal items appear on the scene, such as abandoned gas masks, barrels, cans, and liquid Plastic bags, etc.
A possible bioterrorist attack: Unknown powder or liquid, abandoned containers and masks, a large number of insects were found in the incident area; 48 hours to 72 hours after the microbial terrorist attack or a few minutes to several hours of the toxin terrorist attack, a large-scale Personnel casualties; a large number of identical clinical cases in the field personnel, a disease with no or extremely rare abnormalities in a geographical area; abnormal epidemics in non-endemic areas; patients distributed along the wind direction, and a large number of animal cases occurred at the same time.