据外媒报道,通用汽车(General Motors)向德国专利商标局(the German Patent and Trade Mark Office)提交了一项专利申请,该专利涉及一种创新系统,能够将汽车车窗转变为高效的扬声器。这一系统有望淘汰传统扬声器所依赖的线圈和锥形振动技术(cone technology)。
On Tuesday, General Motors Co (GM) stock saw a decline, ending the day at $53.66 which represents a decrease of $-1.38 or -2.51% from the prior close of $55.04. The stock opened at $55.1 and touched a ...