There is no ticket conductor on bus, so passengers must pull the signalcord to let driver open the rear door when you get to the stop.
美国的公共汽车没有售票员，因此乘客到站下车前只有自己拉动钢丝绳告知司机有人要下车。
2
The products are mainly be used for computers, audio, video machines and so on, which includes signal cable, wire harness, power cord, LAN cable.
公司生产的产品主要应用于电脑音频视频电器等领域，包括信号线电子线电源线网路线等。
3
The Archimedes spiral cord modulating chopper's exposure efficiency was theoretically analyzed and numerical simulated, and its impact on the following signal processing was obtained.