单词：Hadfield's manganese steel
单词：Hadfield's manganese steel 相关文章
This is Scientific American's 60-Second Science, I am Cynthia Graber. This'll just take a minute. It might look and even feel like paper, but a new material created by scientists at MIT is designed to be an oil spill super-absorber. This technology d
Scientific American(六)月
STEVE INSKEEP, HOST: President Trump's push for tariffs on steel and aluminum imports is driven in part by competition from China. The United States still produces most of its own steel, we should be clear. But the industry has faced pressure from ch
2018年NPR美国国家公共电台3月
STEVE INSKEEP, HOST: American steelmakers are excited about President Trump's proposal to put 25 percent tariffs on imported steel. They say the tariffs will help level the playing field against competitors in China. But in one Michigan county that v
2018年NPR美国国家公共电台3月
DAVID GREENE, HOST: We're going to visit a small town in Western Pennsylvania now that's worried about losing steel jobs. Several hundred people work for NLMK in Farrell, Penn. This is a Russian-owned steel mill that uses Russian steel, and so it's b
2018年NPR美国国家公共电台6月
By Nathan King New York 03 November 2009 USS New York A U.S. warship built with steel from the ruins of the World Trade Center has arrived in New York. The USS New York stopped alongside Ground Zero to fire a 21-gun salute honoring those who died in
VOA标准英语2009年(十一月)
BEIJING, Aug. 19 (Xinhua) -- China's steel output growth slowed in July and prices of steel products have continued to drop, according to data from the National Development and Reform Commission (NDRC). Crude steel production gained 4.2 percent year
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