Faster Than The SR-71 - The MiG 41 Foxbat 2.0 'Manned aircraft': White House addresses New Jersey drone sightings High-fat diets have an ‘extraordinary’ effect on anxiety and mental health ...

记者11月21日从中国煤炭科工集团（以下简称中国煤科）获悉，该集团所属煤炭科学技术研究院有限公司（以下简称煤科院）聚萘二甲酸二甲酯（PEN）单体年百吨级中试项目，日前正式步入落地实施阶段。这是国内首个煤基PEN材料单体百吨级中试装置。该中试实验 ...

This year, the kids want a gift that keeps on giving. Something like Amazon’s hottest 3D pen set, a one-of-a-kind gadget that is completely child-safe, provides hours of entertainment and fuels ...