3 小时
Tech Xplore on MSNAct before it cracks: Innovative coating of concrete to protect bridgesElastomers similar to paint coatings developed at the University of Luxembourg and the Technical University of Darmstadt, ...
A bistable LCD screen that retains its image without power. Cholesteric LCDs use nematic liquid crystal molecules in a layered, spiral formation (chiral nematic), and power is only required to ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果