MRS 手动啟动开关(Manual Release Station)
MSD 电动排烟风门(Motorized Smoke Damper)
MU 补给水管(Make Up Water Pipe)

NC 常闭(Normally Closed)
NIC 不属本工程(Not In Contract)
NO 常开(Normally Open)
NTS 未按比例(Not To Scale)

OA 外空气(Outside Air)
OBD 对开式风门(Opposed Blade Damper)
OS & Y 軛与外螺牙(Outside Screw & Yoke)

PAU 预冷空调箱(Pre-Cooling Air Handling Unit)
PAC 箱型冷气机(Packaged Air Conditioner)
PCC 箱型空调箱(Package Air Handling Unit)
PCD 气动控制风门(Pneumatic Control Damper)
PCHP 一次冰水泵(Primary Chilled Water Pump)
PCV 气动控制阀(Pneumatic Control Valve)
PD 压降(Pressure Drop)
PFSD 气动防火排(防)烟风门(Pneumatic Fire & Smoke Damper)
PFE 手提式灭火器(Portable Fire Extinguisher)
PG 压力表(Pressure Gauge)
PH 语音装置(Phonetic Device)
POD 气动风门(Pneumatic Operated Damper)
PPM 百万分之一(Parts Per Million)
PS 压力感测器(Pressure Sensor)
PSD 气动排烟风门(Pneumatic Smoke Damper)
PT 压力水槽(Pressure Tank)
PW 压力开关(Pressure Switch)

RA 回风(Return Air)
RAF 回风机(Return Air Fan)
RAG 格栅式回风口(Return Air Grille)
RAO 回风开口(Return Air Opening)
RAP 回风花板(Return Air Perforated Plate)
RAR 格栅式回风口附风门(Return Air Register)
RD 屋顶落水头(Roof Drain)
RD 冷媒式乾燥机(Refrigeration Dryer)
RF 屋顶通风扇(Roof Fan)
RH 相对湿度(Relative Humidity)
RL 冷煤液体管(Refrigerant Liquid Pipe)
RP 冷煤泵(Refrigerant Pump)
RPM 转速(Revolution Per Minute)
RS 冷煤吸入管(Refrigerant Suction pipe)
RT 冷冻吨(Tons Of refrigeration)
RWP 回水管(Return Water Pipe)

Sp 蒸汽管(Steam Pipe)
SAF 送风机(Supply Air Fan)
SAG 格栅式送风口(Supply Air Grille)
SAO 送风开口(Supply Air Opening)
SAR 格栅式送风口附风门(Supply Air Register)
SAT 消音箱(Sound Attenuator)
SCHP 二次冰水泵(Secondary Chilled Water Pipe)
SD 肥皂架(Soap Dispenser)
SD 排烟风门(Smoke Damper)
SEF 排烟风机(Smoke Extraction Fan)
SG 製程气体管(Special Gas)
SH 蒸汽加湿器(Steam Humidifier)
SHR 莲蓬头(Shower)
SP 蹲式马桶(Squatting pan)
SP 静压(Static Pressure)
SPF 楼梯加压风机(Stair Pressurization Fan)
SS 托布盆(Service Sink)
SS 蒸汽供汽管(Steam Supply Pipe)
SSP 杂质分离泵(Solid Separator pump)
SW 排粪管(Soil Water pipe)
SWP 污物泵(Sewage Pump)
SWR 软水回水管(Soft Water Return Pipe)
SWS 软水送水管(Soft Water Supply Pipe)

TC 温度控制器(Temperature Controller)
THS 温度开关(Thermostat)
TOD 风管顶部Top Of Duct)
TOP 管路顶部(Top Of Pipe)
TP 全压(Total Pressure)
TS 温度感测器(Temperature Sensor)
TYP 典型的(Typical)
 
UR 小便斗(Urinal)
 
V 通气管(Vent Pipe)
VAB 可变风量风箱(Variable Air Volume Box)
VAF 变风箱(Fan Power - Variable Air Volume Box)
VB 真空破除器(Vacuum Break)
VD 手调风门(Volume Damper)
VFD 变频器(Variable Frequency Drive)
VTR 伸出屋顶通气管(Vent Thru Roof)

W/.... 附.… (With)
WAC 窗型冷气机(Window Type Air Conditioner)
WB 湿球(Wet Bulb)
WC 座式马桶(Water Closet)
WCH 水冷式冰水主机(Water Cooled Chiller)
WCT 水化学处理(Water Chemical Treatment)
WEG 壁式格栅排气口(Wall Exhaust Grille)
WER 壁式格栅排气口附风门(Wall Exhaust Register)
WF 壁式通风扇(Wall Fan)
WH 热水器(Water Heater)
WHA 水鎚吸收器(Water Hammer arrestor)
WM 水流量计(水錶)(Water Meter)
WP 纯水器(Water Purifier)
WS 给水管(Water Supply Pipe)
WSG 壁式格栅送风口(Wall Supply Griller)
WSR 壁式格栅送风口附风门(Wall Supply Register)
WSS 水杂质分离器(Water Solid Separator)
WT 水箱(Water Tank)
WW 排水管(Waste Water Pipe)
 
YS Y型过滤器(Y-Strainer)