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tarty-line automatic telephone
共线自动电话
VF selective calling
音频选叫
general calling
全呼
group calling
组呼
individual calling
单呼
dispatching telephone control board with VF selective calling
音选调度电话总机
dispatching telephone subset with VF selective calling
音选调度电话分机
tandem distributor for dispatching telephone with FV selective calling
音选调度电话汇接分配器 or 调度分配器
selective calling and talking box for dispatching office
调度所选叫通话箱
tarty-line telephone control board with VF silective calling
音选同线电话总机
praty-line telephone distributor for VF selective calling
音选同线电话分配器
party-line telephone subset with VF selective calling
音选同线电话分机
two-way repeater for VF selective calling or two-way repeater
音选双向增音机 or 双向增音机
bridging filter for dispatching telephone with VF selective calling
音选调度电话滤波器
command telephone control board
指挥电话总机
train out report telegraph
列车确报电报
station-yard communication
站场通信
railway station telephone
铁路站内电话
switchman's telephone
扳道电话
concentrated telephone unit
电话集中器
control set for sound amplifying in yard
扩音转接机
speaking post in yard
扩音柱
optical fiber
光纤
single-mode optical fiber
单模光纤
graded index multimode optical fiber
多模渐变型光纤
core diameter
芯径
cladding diameter
包层直径
coating
被覆层
refrative-index profile
折射率分布
numerical aperture
数值孔径
mode field diameter
模场直径
core concentricity
芯同心度
non-circularity of core
芯不圆度
total internal reflection
全反射
guided modes
传导模
radiation modes
辐射模
leaky modes
漏泄模
attenuation constant
衰减常数
chromatic dispersion constant
色散常数
near field
近场
far field
远场
cut-off wavelength
截止波长
bandwidth of an optical fiber
光纤带宽
optical line terminal equipment
光线路终端设备
average optical output power
平均输出光功率
receiver sensitivity
接收机灵敏度
receiver dynamic range
接收机动态范围
operating wavelength
工作波长
optical transmission mode
光传输模式
optical source
光源
laser
激光器
light-emitting diode or LED
发光二极管
optical detector
光探测器
optical connector
光连接器
optical adapter
光适配器
optical attenuator
光衰减器
system margin
系统余度
optical [regenerative] repeater
光[再生]中继器
optical interface
光接口
optical fiber distribution frame
光纤分配器
optical fiber cable
光缆
combined optical fiber cable
综合光缆
tension member
加强构件
sheath
护套
buffer layer
缓冲层
interstitial wire
填充线
jelly filled type optical fiber cable
充油型光缆
gas maintenance type optical fiber cable
充气维护型光缆
optical fiber fusion splicing machine
光纤融接机
optical fiber cutter
光纤切断器
optical fiber stripper
光纤剥除机
optical fiber cable joint closure
光缆接头
protection sleeve
保护套管
optical power meter
光功率计
stabilized light source
稳定光源
optical time domain reflectometer
光时域反射仪
Rayleigh scattering
瑞利散射
Fresnel reflection
菲涅尔反射
backseattered signal
反向反射信号
optical fiber splice loss
光纤接续损耗
optical fiber communication system
光纤通信系统
optical fiber digital line system
光纤数字线路系统
optical regenerator section
光再生[中继]段
optical digital section
光数字段
optical line protection switching equipment
光线路保护切换设备
supervision system
监视系统
wavelength division multiplex
波分复用
railway radio communication
铁路无线通信
railway mobile communication
铁路移动无线通信
relay radio communication for railway
铁路无线电中继通信
inductive radio communication for railway
铁路感应无线电通信
single side band communication
单边带通信
simplex radio communication
单工无线电通信
same-frequency simplex radio communication
同频单工无线电通信
different-frequency simplex radio communication
异频单工无线电通信
duplex radio communication
双工无线电通信
semi-duplex radio communication
半双工无线电通信
compatible simplex-duplex radio communication
单双工兼容无线电通信
minimum available receiving level
最小可用接受电平
minimum receiving field strength
最小接收场强