The retracting mechanism is light and smooth and the pen itself is compatible with D1-style refills. For the clumsy, ...

It’s a major buzzkill when that happens. Luckily, you can avoid this annoying issue when you upgrade your regular old pen and paper to this smart pen and reusable notebook. All you need is the ...

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 ...