rem 遠(yuǎn)方(remote)
rsd 捲門(roller shutter door)
reqd 要求(required)
res 電阻器(resistor)
rev 校正(revision)
rf 無線電頻率(radio frequency)
rm 室(room)
rmc 鐵路維護(hù)電路(rail way maintenance circuit)
rmt 遠(yuǎn)端多工終端機(jī)(remote multiplex terminal)
roc 鐵路行車電路(railway operation circuit)
rpm 每分轉(zhuǎn)數(shù)(revolutions per minute)
rsc 鋼導(dǎo)線管(rigid steel conduit)
rt 防雨(rain tight)
rtd 熱阻溫度偵測器(resistance temperature detector)
rx 接收器 / 接收(receiver / receive)
recpt 插座(receptacle)
rv 降壓起動器(reduced voltage starter)
s 秒(second)
sb 備用(standby)
scc 短路容量(short circuit capacity)
sect 斷面 / 尺規(guī)(section / sector)
seq 序列(sequence)
sf 葉片(split flap)
sfb 葉片板(split flap board)
sfc 葉片控制器(split flap controller)
sh 分路(shunt)
shld 遮蔽(shield)
sld 密封設(shè)施(sealing device)
sim 近似(similar)
sm 掛裝(surface mounted)
s/n 訊號雜音比(signal to noise ratio)
sol 螺管(solenoid)
sp 備用品(spare)
spec 規(guī)格 / 規(guī)范(specification)
spkr 揚(yáng)聲器(speaker)
spdt 單極雙投(single pole double throw)
spst 單極單投(single pole single throw)
spm 同步及并聯(lián)模組(synchronizing and paralleling module)
ss 同步開關(guān)(synchronizing switch)
st 短延時(short time delay)
sta 站(station)
std 標(biāo)準(zhǔn)(standard)
sub 分站 / 變電站(substation)
supv 監(jiān)督(supervisory)
sw 開關(guān)(switch)
swr 開關(guān)器(switcher)
swbo 開關(guān)箱(switch board)
swgr 開關(guān)設(shè)備(switch gear)
sym 圖例(symbol)
symm 對稱(symmetrical)
sync 同步化(synchronize)
sys 系統(tǒng)(system)
t1,t2 發(fā)射器(編號)(transmitter number of)
tb 端子板(terminal board)
tbx 端子箱(terminal box)
tc 跳脫線圈(trip coil)
tx 傳送器 / 發(fā)射機(jī)(transmitter)
typ 代表同樣(typical)
twr 塔(tower)
tids 列車資訊顯示系統(tǒng)(train information display system)
tdm 分時多工(time division multiplex)
tcv 溫度控制閥(temperature control valve)
td 行車調(diào)度(train dispatching)
tdc 延時閉路(time delay closing)
tdo 延時開路(time delay opening)
tdr 延時電驛(time delay relay)
tel,t 電話(telephone)
telecom 電信(telecommunications)
temp 溫度(temperature)
term 端子(terminal)
thh 電信手孔(telecommunications hand-hole)
thru 管槽(through)
tm 電視監(jiān)視機(jī)(television monitor)
tmh 電信人孔(telecommunications manhole)
toc 混凝土頂部(top of concrete)
tpc 中國臺灣電力公司(Chinese Taiwan power company)
tpst 三極單投(triple pole single throw)
trt 列車無線電話系統(tǒng)(train radio telephone system)
tv 電視(television)
ucp 單元控制盤(unit control panel)
uf 地板下(under floor)
ug 地下(under ground)
uhf 超高頻(ultra high frequency)
uon 除另有註明者外(unless otherwise noted)
ups 不斷電系統(tǒng)(uninterruptible power supply)
uv 欠電壓(under voltage)
uv 微伏(micro volt)
v 伏特(volt)
va 伏安(volt ampere)
vac 交流電壓(volt alternating current)
vcss 語音通訊交換系統(tǒng)(voice communications switching system)
vda 視訊分配放大器(video distribution amplifier)
vdc 直流電壓 / 視訊顯示控制(volts direct current / video display control)
vdt 視訊顯示終端機(jī)(video display terminal)
vent 通風(fēng)(ventilation)
vert 垂直(vertical)
vf 音頻(voice frequency)
vhf 超高頻(very high frequency)
vid 視訊(video)
vm 電壓表(voltmeter)
vs 電壓切換(voltmeter switch)
vsc 可變速控制器(variable speed controller)
vswr 電壓駐波比(voltage standing wave ratio)
vt 防煙汽(vaportight)
vtr 錄影機(jī)(video tape recorder)
w/ 含…/及…(with)
w 瓦特 / 線(watt / wire)
w/o 不含…(without)
wp 不受氣候影響(weatherproof)
wt 防水(watertight)
xlp 交連聚氯乙烯(cross linked polyethylene)
xmit 發(fā)送(transmit)
xfmr 變壓器(transformer)
xmtr 發(fā)射器(transmitter)