长跨距光传输
long span optical transmission
长跨桥
long span bridge
beam with variable sections
long-span bridge
超长跨距传输
ultra-long span transmission
超长跨距全光通信系统
ultra long haul all-optical communication system
等代简支梁跨长
equivalent span of simple supported beam
多跨长简支梁桥
multi-span long simply supported bridge
接触电压和跨步电压
touch voltage and step voltage
跨步1和0测试
marching 1’s and 0’s test
跨步电位差
step potential difference
跨步电压
step potential difference
Step voltage
step potential
step-voltage