According to news from foreign media, the Ministry of Industry, Trade and Resources of South Korea issued a report entitled "Trends in Raw Materials and Components Trading in the First Half of 2014" on July 7. The report shows that Korea’s trade deficit with Japanese…
Valve material pressure and temperature control table
grey cast iron:
Gray iron for nominal pressure PN ≤ 1.0MPa, the temperature of -10 ℃ ~ 200 ℃ of water, steam, air, gas and oil media. Gray cast iron commonly used brands: HT200, HT250, HT300, HT350. …
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Recently, Yu Xuefeng, a researcher at the Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, and Yang Ying, an associate professor of the School of Metallurgy and Environment at Central South University, and Xiao Si, associate professor of the School of Physics and Ele…
The biggest characteristic of the shelter is to have a large advertising column, which will be updated in real time and the content will be …