collector slit,接收器狭缝

collimation axis,视轴

collimation line,视准线

collision,冲突，碰撞

collisional activation,碰撞激活

collisional activation mass spectrometer,碰撞激活质谱计

colorimeter,比色计；色度计

colour filter,颜色滤光片

colour meter,水色计

column,镜筒

column capacity,柱效能

column life,柱寿命

column-parity field,列奇偶校验字段

column switching,柱切换

coma,彗差

combination digital logger,数字式综合测井仪

combination electrode,复合电极

combination logging instrument,组合测井仪

combination water meter,复式水表

combined column,复合柱

combined load testing machine,得合试验机

combined pressure and vacuum gauge,压力真空表

combined test,综合试验

combined test cabinet,综合试验箱

command,命令

command accepted,命令接受

command message,命令报文

command operation,命令操作

command-reply transaction,命令—回答事务

commissioning test,运行试验

common control signals,公共控制信号

common magnet galvanometer,共磁式振动子

common mode rejection,共模抑制

common mode rejection ratio(CMRR),共模抑制比

common mode signal,共模信号

common mode voltage,共模电压

communication subnet,通信子网

communication system,通信系统

communications terminal,通信终端

commutation error,换码误差

commutation point,转码点

comparative read-out,比较读出

comparator,比较器

comparator coil,比较线圈

compare,比较

comparing element,比较元件

comparison calibration,比较法校准

comparison method of calibrating thermocouple,热电偶比较检定法

comparison method of calibration,比较法标定

comparison(method of )measurement,比较测量法

comparison standard,比较标准器

comparison value,比较值

compass,罗盘（仪）

compass theodolite,罗盘经纬仪

compatibility,兼容性；相容性

compensated micromanometer,补偿微压计

compensated pyrgeliometer,补偿直接日射强度表

compensated scale barometer,定槽水银气压表

compensating element,补偿元件

compensating error of automatic vertical index,竖直度盘指标补偿误差

compensating extension lead,补偿型延长导线

compensating gauge,补偿计（片）

compensating setting error of leveling compensator,视轴安平补偿误差

compensation,补偿

compensation density logger,补偿密度测井仪

compensation neutron logger,补偿温度范围

compensation type airborne electromagnetic instrument,补偿式航电仪

compensator,补偿器

compensator level,自动安平水准仪

compiler,编译程序

compiler generator,编译程序的生成程序

complementary gas,附加气

complementary(method of)measurement,互补测量（法）

complete controllability,完全可控性；完全能控性

cpmplete failure,完全失效

complete immersion thermometer,（完）全浸（没）温度计

complete observability,完全可观测性；完全能观测性

complete set up for chemical oxygen demand determinations in seawater, 海水化学耗氧量测定系统

complex radiation,复电阻率仪

complex system,复杂系统

complexation chromatography,络合色谱法

component proton magnetometer,分量质子磁力仪

component superconducting magnetometer,超导分量磁力仪

composite control,组合控制

composite error,合成误差

composite test,组合试验

composite-temperature-compensation strain gauge,组合温度补偿应变计

composition deviation transmitter,成分（偏差）变送器

compound control,复全控制

compound control system,复合控制系统

compound oxide series gas sensor,复合氧化物系气敏元件

compound system,复合系统

compound-wound current transformer,混合绕组电流互感器

compressibility factor,压缩系数

compression force,压缩力

compression plate,压板

compression testing machine,压力试验机

compressive strength,压缩强度