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breather｜换气装置，通气孔；生物rn
breather adapter｜通气接管，通气阀塞头rn
breathing｜呼吸rn
breathing apparatus｜呼吸用具rn
breathing line｜呼吸线rn
breathing mask｜呼吸面具rn
breathing plug｜呼吸塞＇在防汽空间的墙上开孔；使绝热层所含的潮气能放出来＇rn
breathing valve｜通气阀rn
breathing…hole｜通气孔rn
breathing…pipe｜通气管rn
breeching｜水平烟道；丫形三通rn
breed｜倍增；复制；繁殖rn
breeze｜煤粉＇屑＇；微风rn
breeze brick｜焦渣砖rn
breeze…line diffuser｜条缝送风口rn
brick｜砖rn
brick and reinforced concrete construction｜混合结构rn
brick baffle｜砖砌挡墙rn
brick bat｜碎砖rn
brick clay｜（制砖用）粘土rn
brick laying｜砌砖rn
brick lining｜砖衬rn
brick setting｜砌砖；砖砌体rn
brick work｜砖砌体rn
bridge｜桥rn
bridge crane｜桥式起重机rn
bridging over｜架设；敷设；跨越rn
brief｜提＇摘＇要；简短的；短暂的rn
brief acceleration｜瞬时加速度rn
bright｜明亮的；光泽的rn
bright coal｜烟煤rn
bright heat treatment｜发光热处理rn
brightness｜亮度rn
brightness temperature pyrometer｜光学高温计rn
brilliant｜白炽＇热＇rn
brine｜盐水rn
brine agitator｜盐水搅拌器rn
brine balance tank｜盐水膨胀箱rn
brine circulation｜盐水循环＇流转＇rn
brine circulator｜盐水循环器，盐水泵rn
brine concentration｜盐水浓度rn
brine cooler｜盐水冷却器＇用蒸发的制冷剂冷却盐水的换热器＇rn
brine distribution｜盐水分配rn
brine drum｜盐水桶＇由大直径的管子组成冷却表面，管中贮有充分的盐水以蓄冷＇rn
brine evaporator｜盐水蒸发器rn
brine expansion tank｜盐水膨胀箱rn
brine flow｜盐水流量rn
brine freezing｜盐水冷冻rn
brine head tank｜盐水膨胀箱rn
brine header｜盐水总管rn
brine inlet｜盐水入口rn
brine line｜盐水管线rn
brine mixing tank｜盐水混合箱rn
brine outlet｜盐水出口rn
brine pipe｜盐水管rn
brine pipe grid…coil system｜盐水格式盘管系统rn
brine pump｜盐水泵rn
brine return｜盐水回水管rn
brine return tank｜盐水回流箱rn
brine riser｜盐水立管rn
brine solution｜盐水溶液rn
brine sparge｜盐水喷雾rn
brine spray｜盐水喷淋rn
brine spray refrigerating system｜盐水喷淋制冷系统rn
brine strainer｜盐水过滤器rn
brine supply｜盐水供应rn
brine tank｜盐水箱rn
brine temperature｜盐水rn
Brinell hardness｜布氏硬度rn
Brinell Hardness Number｜布氏硬度数rn
briquette ice｜砖冰rn
British Association Standard｜英国协会标准rn
British Coal Utilization｜英国煤炭利用研究协会rn
British puter Society｜英国计算机学会rn
British Engineering Standard Association｜英国工程标准协会rn
British Hydromechanics Research Association｜英国流体力学研究协会rn
British Patent｜英国专利rn
British Refrigeration and Air Conditioning Association｜英国制冷空调协会rn
British Refrigeration Association｜英国制冷协会rn
British Standard｜英国标准rn
British Standard Pipe｜英国标准管rn
British Standard Specification｜英国标准规范rn
British Standard Wire Gauge｜英国标准线规rn
British Standards Institution｜英国标准协会rn
British thermal unit｜英国热单位（Btu）＇在60f30in（英寸）水银柱条件下，1lb水升高1d°F所需热量，相当于1055。06J（焦）或0。252kCal
（千卡）＇rn
British thermal unit per hour｜每小时英热单位rn
British Valve Manufacturers' Association｜英国阀门制造者协会rn
BROAD｜远大rn
broad step｜楼梯平台rn
broken ice｜碎冰块rn
broken line｜虚线，折线rn
bromide｜溴化物rn
bromide of lithium｜溴化锂rn
bromine｜溴rn
bromotrifluoromethane｜（CBrF3）；一溴三氟甲烷＇制冷剂R13B1＇rn
bronze｜青铜rn
brounheart｜果心变褐＇由于大气中二氧化碳有害浓度引起的水果（主要是苹果和梨子）的果心部分发褐＇rn
brown coal｜褐煤rn
Brownian movement｜布朗运动rn
brush filter｜毛刷过滤器＇具有刷状滤料的空气过滤器＇rn
BS｜boiler surveyed 锅炉检查完毕；British Standard 英国标准；Bureau of Standard 标准局（美）rn
BSc。｜Bachelor of Science in Engineering 工学士rn
B…scale｜B声压级＇声压级55与85dB（分贝）之间＇rn
BSD｜Building System Design 美国《建筑系统设计》劳动保护刊rn
BSI｜British Standards Institution 英国标准协会rn
bsmt｜basement 地下室rn
BSP｜British Standard Pipe 英国标准管rn
BSS｜British Standard Specification 英国标准规范rn
BSWG｜British Standard Wire Gauge 英国标准线规rn
Btu｜British thermal unit；英国热单位（Btu）＇在60f30in（英寸）水银柱条件下，1lb水升高1d°F所需热量，相当于1055。06J（焦）或
0。252kCal（千卡）＇rn
Btu。｜British thermal unit 英热单位rn
Btuh｜British thermal unit per hour 每小时英热单位rn
bubble｜气泡rn
bubble chamber｜气泡室rn
bubble flow｜泡状流rn
bubbling point｜沸点rn
bucket｜桶，吊桶，浮子rn
bucket area｜叶片通道通流截面积rn
bucket conveyer｜斗式运输机rn
bucket elevator｜斗式提升机rn
bucket steam trap｜浮桶式疏水器，浮筒式回水盒rn
bucket wheel blower｜叶轮式通风机rn
buckle outward｜向外凸出，向外弯曲rn
budget cost｜预算（价）rn
budget estimate｜概算rn
buff｜抛光；抛光轮；浅黄色rn
buffer｜缓冲器rn
buffer area｜缓冲区rn
buffer tank｜缓冲箱rn
build｜建造，建筑，建立，组成rn
building｜建筑物，房屋，组装rn
building area｜建筑面积rn
building block｜建筑群；建筑砌块rn
building code｜建筑法规rn
building design｜建筑设计rn
building envelope｜围护结构rn
building flow zones｜建筑气流区rn
building heating entry｜热力入口rn
building law｜建筑法rn
building line｜建筑界线rn
building materials｜建筑材料rn
building module｜建筑模数rn
building operation center console｜房屋中心控制台rn
building paper｜防潮纸，油毛毡；隔音纸rn
building site｜建筑地点rn
Building Societies' Institute｜建筑学会联合会rn
building specifications｜建筑规格，房屋做法说明书rn
Building System Design｜美国《建筑系统设计》劳动保护刊rn
building tile｜空工砖，瓦rn
building zone｜建筑范围rn
buildup｜增长，累积，发展，建造，组合，装配；用砖填塞（门窗）rn
built…in｜内装的，固用的，内在的rn
built…in air…conditioner｜内装空调器rn
built…in chimney｜置于墙内的烟道，内装烟道rn
built…in convector｜内装对流器rn
built…in cooling unit｜内装冷气机组rn
built…in fitting｜预埋件，埋设件rn
built…in radiator｜内装放热器rn
built…up｜组装，分段的，积累的，建成的rn
built…up apparatus｜组合设备rn
built…up member｜装配件，组合构件rn
bulb｜球，球状物；（温度计的）温包，容器，外壳rn
bulk｜体积；主整体；松散材料，大块＇批＇rn
bulk cement｜散装水泥rn
bulk density｜堆积密度rn
bulk factor｜容积压缩因数；密度系数，压制体积系数rn
bulk freezing｜散装冻结rn
bulk material｜松散材料rn
bulk meter｜流量计＇测量容积的流量计＇rn
bulk specific gravity｜毛体积比重，容重rn
bulk stowage｜散装贮藏rn
bulkhead｜隔墙＇板＇rn
bulking figure｜容量rn
bullet valve｜球阀rn
bumper｜缓冲器，减振器；消音器rn
bumpy flow｜旋涡流rn
bundle of tubes｜管束rn
bunker｜煤箱，斗仓；贮冰室＇用以冷却某一空间的冰之贮藏室＇rn
bunker coil｜储冰室盘管，煤斗防冻盘管rn
bunkering｜装燃料，贮燃料rn
Bunsen burner｜本生灯rn
buoy｜浮标＇子，筒＇；漂浮rn
buoyancy｜浮力；自然引风rn
buoyancy level indicator｜浮力液面，指示器rn
buoyant force｜浮力rn
Bur。 St。｜Bureau of Standards 标准局（美）rn
burden｜荷载rn
Bureau of Standard｜标准局（美）rn
Bureau of Standards｜标准局（美）rn
burette｜量管，滴定管rn
burgy｜煤屑rn
buried｜埋入的，埋藏的rn
buried depth｜埋置深度rn
buried pipe｜埋设管，暗管rn
buried sleeve｜预埋套管rn
burn｜燃烧，烧焦rn
burner｜燃烧器rn
burner arrangement｜燃烧器布置rn
burner bank｜燃烧器组rn
burner body｜燃烧器本体rn