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One year of the COVID-19 pandemic: eight things we learned
1. Masks are essential 2. Not only the elderly will be affected 3. The new coronavirus disease is not a "little cold" 4. The new coronavirus originated in animals (not made in laboratories) 5. Mal
Quenching and martensite
There are two basic forms of martensite, one is lath martensite, which is composed of groups of laths under the crystal phase microscope, and the other is lamellar martensite, which is bamboo leaf lik
Austempering
Steels, etc. are Austempered after quenching (to obtain bainite) The results show that the lower bainite is obtained to enhance the strength, hardness, toughness, wear resistance and plasticity of th
Used masks cause serious environmental pollution.
As the COVID-19 epidemic continues, a large number of used masks are not properly recycled and disposed of, resulting in serious environmental pollution.Many used masks have been thrown into the ocean
Honest Horse wish you Happy Easter!
Falling in love with the lord is the greatest romance;searching him,the gretast adventure,finding him,the greast achivement,and being with him,the great sources of haapiness.Honest Horse wish you Happ
Hardness and density of cast steel shot
One of the important properties of cast steel shot: density and hardness (1) The hardness of steel shot is directly proportional to the cleaning speed, but inversely proportional to the service life.
Selection of steel shot with different sizes
Generally speaking, forging and steel structure and other appearance requirements are not strict are basically more than 1.0, shipbuilding and car building are usually less than 1.0, the first judgmen
Origin and custom of White Day
"White Day" originated in Rome in the third century. On February 14th, the Roman emperor rescued a pair of lovers who were to be executed for violating the ban on love and marriage. The Roman emperor
Biden called on all Americans to fight the virus together
As of March 11, the United States has because will be coronavirus to suspend all activities for a year, the United States has more than 29.28 million cases of the cumulative, death cases reached 53000
Focus on the two sessions
With the opening of the fourth session of the 13th National Committee of the Chinese people's Political Consultative Conference in Beijing on March 4, the two sessions of the National Committee of
Origin of Maple Sugar Festival
Canada is rich in maple leaves, among which the provinces of Quebec and Ontario in the southeast have the most beautiful maple leaves. Canada is full of maple forests. In late autumn, the maple leaves
Novel coronavirus led to a decline in employment
According to the latest data, the America unemployment rate fell by just 0.1% in February, Most of the job growth that month was in the service sector. The Labor Department said February's job m
professional firm engaged in the research, development, sale, and service of Steel Shot, Steel Grit, sandblaster, sandblasting machine, garnet sand. We are located in Jinan with convenient transportation access. .
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