symmetrical [balanced] input,对称[平衡]输入

symmetrical [balanced] output,对称[平衡]输出

symmetrical double yoke permeameter [magnetic bridge],对称双轭磁导计

synchro detector,同步检测器

synchronoscope,同步指示器

synchronous transmission,同步传输

syphon,弯管

system,系统

system aggregation,系统集结

system analysis,系统分析

system approach,系统方法

system architecture,体系结构

system assessment,系统评估

system crate,系统机箱

system decomposition,系统分解

system deviation,系统偏差

system diagnosis,系统诊断

systems engineering,系统工程

system environment,系统环境

system evaluation,系统评定；系统评价

system homomrphism,系统同态

system identification,系统辨别

system interrupt,系统中断

system isomorphism,系统同构

system maintainability,系统可维护性

system management,系统管理

system matrix,系统矩阵

system model,系统模型

system modeling,系统建模；系统模型化

system of units (of measurement),（测量）单位制

system optimization,系统（最）优化

system parameter,系统参数

system performance test,系统性能试验

syste planning,系统规划

system production time,系统生产时间

system reliability,系统可靠性

system resourse,系统资源

system sensitivity,系统灵敏度

system simulation,系统仿真

system software,系统软件

system state,系统状态

system statistical analysis,系统统计分析

system test time,系统测试时间

system theory,系统理论

systematic error,系统误差

systematic uncertainty,系统不确定度

systematology,系统学

tachometer,转速表

tachometer generator,测速发电机

tacho-torquemeter,转矩转速测量仪

tailing peak,拖尾峰

tailored control system,柔性控制系统

take-off angle,出射角

take-up,缩格

tandem data circuit,级联数据电路

tape recorder of digital logging,数字测井磁带记录仪

taperecorder,磁带记录仪

tapping,取压口；轻敲

target,靶；觇标

target computer,目标计算机

target flow transducer,靶式流量传感器

target flowmeter,靶式流量计

target size,目标尺寸

taring construct,去皿装置

task,任务

task allocation,任务分配

task coordination,任务协调

task cycle,作业周期

task level language,作业级语言

task optimization,任务优化

task program,作业程序

taut supension galvanometer,张丝式检流计

technical evaluation,技术评定；技术评价

technical regulation,技术法规

technical specification,技术规范

techniques for approximating the ITS-90,ITS-90的近似技术

telecommunication,远程通信

telemeasuring equipment,遥测装置

telemechanics,运动学

telemetering and remote control system,遥测遥控系统

telemetering communication system,遥测通信系统

telemetering instrument,遥测仪器仪表

telemetering STD profiling system,遥测温盐深剖面仪

telemetering system of frequency division type,频分（制）遥测系统

telemetering system of time division type,时分（制）遥测系统

telemetering wave buoy,遥测波浪浮标

telemetry,遥测

telemetry strain indicator,遥测应变仪

telemetry system,遥测系统

teleological system,目的系统

teleology,目的论

teleophotometer,遥测光度表

teleprinter,电传打字机

teleprocessing,远程处理

telepsychrometer,遥测湿度仪

telescope,望远镜

telescope level,望远镜水准器

telescopic system,望远镜系统