sound attenuation
消声器（噪声衰减装置）
calibrating set for resistance attenuator
电阻衰减器校正装置
attenuator: a device that attenuates an electrical signal.
衰减器,减压器: 使电子讯号减弱的装置。
A device that attenuates an electrical signal.
衰减器，减压器使电子讯号减弱的装置
The Evaluation of Standard Measurement Uncertainty with FSMR
FSMR衰减标准装置的不确定度评定
Setting the current rising and reducing device. The time can be adjusted.
设有电流上升、电流衰减自动装置，时间长短可调。
panel mount variable optical attenuator
面板安装可变光衰减器
An electronic device that is capable of relaying a signal without attenuation in velocity.
人造神经纤维一处能中转传递信号的电子装置，无速度上的衰减
The uncertainty in the measuring range of 0-42dB is less than 5×10~(-4).
该装置在0—42分贝的衰减测量量程内,达到的不确定度优于±5×10~(-4)。
This paper describes the main characteristics of the 30 MHz WBCO attenuator standard and the calibration system.
本文介绍30兆赫截止衰减器一级标准及其校准装置的一些主要特点。
hazard reducing device
减危装置 -防触电用
geared propulsion machinery
齿轮减速式推进装置
intermediate wheel gear
带中间齿轮的减速装置
deceleration spark advance control
减速点火提前控制装置
activated anti-rolling tank stabilization system
主动水舱式减摇装置
passive tank stabilization system
被动水舱式减摇装置
geared-diesel installation
齿轮减速式柴油机装置
diesel-electric reduction
柴油机电动减速装置