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步机
driving torque || 驱动转矩，传动转矩
driving trailer || 驱动拖车
driving transformer || 推动变压器
driving unit || 传动装置
driving voltage || 激励电压，励磁电压，控制电压
driving wheel || 转向盘，驱动轮
driving winding || 激励绕组，策动绕组
dromedary || 半挂车牵引车
drone aircrafts || 遥控飞机，无人驾驶飞机
droogmansite || 纤硅镁铀矿
drooping characteristic || 下降特性
drop annunciator || 掉牌通报器
drop arm || 转向摇臂
drop axle || 中凹式前桥
drop bar || 接地棒，短路棒
drop box || 低输出轴变速器
drop bracket transposition || 下降托架换位法
drop casting || 落模铸造
drop center rim || 凹槽轮箍
drop feed carburizing || 滴注式渗碳法，液滴渗碳法
drop forging || 模锻，落锤锻
drop gate || 直接浇口
drop gear || 低输出轴变速器
drop grate || 倾卸炉篦
drop hammer || 落锤
drop hardness test || 落锤硬度试验，萧氏硬度试验
drop indicator || 掉牌指示器
drop indicator relay || 掉牌继电器
drop line || 用户引入线
drop lubrication || 滴油润滑法
drop method || 点滴法
drop of potential || 电位降
drop of pressure || 压力降落
drop of temperature || 温度降
drop of voltage || 电压降
drop oiler || 滴油器
drop point || 滴点
drop relay || 脱扣继电器，掉牌继电器
drop shutter test || 坠落试验，坠落粉碎试验
drop size meter || 滴谱仪
drop stamp || 落锤
drop test || 落锤冲击试验，落锤试验，下落试验，点滴试验，跌落试验
drop type fuse link || 跌落式保险丝管
drop weight method || 滴重法
drop-away current || 脱扣电流
drop-away time || 释放时间
drop-away voltage || 脱扣电压
drop-center axle || 中凹式前桥
drop-center rim || 凹槽轮辋
drop-dead halt || 完全停机
drop-frame trailer || 低货台挂车
drop-head || 折叠式车顶桥车
drop-in winding || 落入式绕组
drop-out current || 去励(磁)电流，灭磁电流，开断电流
drop-out of step || 失(去同)步
drop-out voltage || 去励(磁)电压，灭磁电压，开断电压
drop-weighted tear test || 落锤撕裂试验
dropdown list || 下拉列表 下拉式列示
droplet || ①小滴，微滴，珠滴，液滴②熔滴
droplet transfer || 熔滴过度
dropout error || 遗失误差
dropout fuse || 跳开式熔断器
dropout time || 释放时间
dropped axle || 中凹式前轴
dropper || ①挂钩②滴管
dropping bottle || 滴瓶
dropping mercury electrode || 滴汞电极
dropping point || 滴点
dropping resistor || 减压电阻器，降压电阻器
dropping steed motor || 具有下降速度特性的电动机，软速度特性的电动机
dropping worm || 脱落蜗杆
dropside flat || 有侧拦平板货车
dropsonde || 下投式探空仪
dropwell || 凹坑
dropwise condensation || 滴状凝缩，滴状冷凝，珠状凝结
drosometer || 露量表
dross || ①浮渣②熔渣③铁渣④渣滓，废物，杂质⑤氧化皮，铁鳞⑥结瘤
drossed bullion || 除铜粗铅
drossing || 扒渣
drossing process || 造渣过程
drossy metal || 渣状金属，带渣金属
drossy metallics || 金属浮渣
drum || ①鼓，鼓轮，鼓形物②磁鼓③圆筒，滚筒(程序)④电缆线盘，绕线架，卷筒⑤锅筒，汽包
drum armature || 鼓形电枢
drum barker || 鼓式剥皮机
drum boiler || 汽包锅炉
drum brake || 鼓式制动器
drum brake for real wheel || 鼓式制动器后轮
drum brake for rear wheel || 后轮毂式制动
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