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| borehole gravimeter | 井中重力仪 | |
| borehole thermometer | 井温仪 | |
| boron chamber | 硼电离室 | |
| boron counter tube | 硼计数管 | |
| borrow | 借入 | |
| bottom flange | 下阀盖 | |
| bottom loading thermobalance | 下皿式热天平 | |
| bottom surface | 底面 | |
| bottorm echo | 底面反射波 | |
| boucherizing | 硫酸铜注入法 | |
| boucherot (squirrel-cage) motor | 双鼠笼式电动机 | |
| boucherot squirrel cage motor | 双鼠笼电动机 | |
| boucherot squirrel cage winding | 双鼠笼绕组 | |
| bougie decimal | 分烛光 | |
| bounce frequency | 弹跳频率 | |
| bound charge | 束缚电荷 | |
| bound electron | 束缚电子 | |
| boundary | 边界,边缘,极限,界限,界面,边 | |
| boundary beam | 边梁 | |
| boundary collocation | 边界配置 | |
| boundary condition | 边界条件 | |
| boundary condition for electromagnetic field | 电磁场的边界条件 | |
| boundary conditions | 边界条件 | |
| boundary dimension | 外形尺寸,轮廓尺寸 | |
| boundary effect | 边界效应 | |
| boundary element | 边缘构件 | |
| boundary growth | 边界增厚 | |
| boundary integral method | 边界积分法 | |
| boundary layer | 边界层 | |
| boundary layer accumulation | 边界层增厚 | |
| boundary layer buildup | 附面层的形成 | |
| boundary layer effect | 边界层效应 | |
| boundary layer energy equation | 边界层能量方程 | |
| boundary layer equations | 边界层方程 | |
| boundary layer friction loss | 附面层摩擦损失 | |
| boundary layer momentum integral equation | 边界层动量积分方程 | |
| boundary layer oscillation | 边界层脉动 | |
| boundary layer probe | 边界层探针 | |
| boundary layer separation | 边界层脱离 | |
| boundary layer separation loss | 附面层脱离损失 | |
| boundary layer skin friction | 边界层表面摩擦 | |
| boundary layer theory | 边界层理论 | |
| boundary layer thickness | 边界层厚度 | |
| boundary light | 边界灯 | |
| boundary line | 分界线 | |
| boundary lubrication | (轴承)面间润滑,界面润滑 | |
| boundary marker beacon | 边界指示标 | |
| boundary node | 边界节点 | |
| boundary particle | 界面颗粒 | |
| boundary point | 边界点 | |
| boundary problem | 边界问题 | |
| boundary resistance | 边界电阻,边界阻力 | |
| boundary science | 边缘科学 | |
| boundary separation | 边界分离 | |
| boundary state of stress | 极限应力状态 | |
| boundary stress | 边缘应力 | |
| boundary surface | 边界面 | |
| boundary temperature | 边界层温度 | |
| boundary tension | 表面张力 | |
| boundary value | 边界值 | |
| boundary value problem | 边界值问题 | |
| boundary wall | 围墙 | |
| boundary wall tube | 炉墙管 | |
| boundary-contraction method | 边界 | |
| bow | 滑板弓架 | |
| bow collector | 集电弓 | |
| bow pantograph | 集电弓 | |
| box | 配电盒 | |
| box gauge | 箱式验潮仪 | |
| box switch | 匣式开关 | |
| box type bridge | 盒式电桥 | |
| box-frame motor | 箱形机座电动机,框形电动机 | |
| brace for lightning rod | 避雷针拉铁 | |
| bracing | 撑臂 | |
| bracing strut | 撑杆 | |
| bracket | 腕臂 | |
| bracket arm | 单臂线担 | |
| bracket panel | 辅助盘 | |
| bracket signal | 支架信号 | |
| bracket-supported plug-in bus way | 装在支架上的插接式母线 | |
| bragg frequency | 布拉格频率 | |
| braided cable | 编织电缆 | |
| braided wire | 编线 | |
| braider | 编组机 | |
| braiding | 编织 | |
| braiding machine | 编组机 | |
| brake | 制动器,闸,制动装置 | |
| brake Brake | 制动器 | |
| brake assembly | 制动系统,刹车装置 | |
| brake axle | 制动轴,制动器轴 | |
| brake block | 制动瓦块,闸瓦 | |
| brake block holder | 闸瓦托,闸瓦座 | |
| brake controller | 制动器,闸控制器 | |
| brake dynamometer | 制动测力计,制动测功机 | |
| brake electromagnet | 制动电磁铁 | |
| brake gear | 制动装置,制动器 | |
| brake horsepower | 制动功率 | |
| brake jack | 制动千斤顶 | |
| brake lamp switch | 刹车灯开关 | |
| brake linkage | 制动联动装置 |
