Toshiba was first to mass-produce laptops. Sharp—which got its name from inventing the mechanical pencil in 1915—pioneered solar cells and LCD screens.
索尼公司发明了晶体管收音机和随身听,东芝是第一个大量生产笔记本电脑的公司,因为在1915年发明了机械铅笔而得名的夏普公司首创了太阳能电池和液晶显示屏。
The physical and mechanical interaction of groundwater soil rock mass in karst collapse evolution is discussed elaborately and a coupling mode is established and studied.
分析了岩溶塌陷演化过程中物理力学上的水土岩相互作用,并对作用模式进行了探讨。
Helical spring mass system (HSMS) is widely used in almost all of mechanical and electrical products due to its structure feature and elastic buffer ability.
螺旋弹簧质量系统由于其结构特点及其缓冲作用在几乎所有机电设备和系统中都有广泛的应用。
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