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膜
lubrication systems || 润滑系统
lubrication test || 润滑试验
lubrication theory || 润滑理论
lubricator || ①润滑器②润滑剂③润滑装置，注油器
lubricators || 注油机
lubricity || 润滑能力，润滑性
ludness || 响度
luff || ①俯仰，倾斜②倾角
luffing crane || 俯仰起重机
lug || ①凸耳，凸缘②耳柄，箱耳③套管④手柄，环状柄，搭子⑤拖，拉
lug bolt || 扁尾螺栓
lug plate || ①焊片②接线板
lug-type terminal post || 凸耳支柱
luggage boot || ①绉纹管套②行李舱③保护罩④接受器⑤进料斗
lugging || 超载运转能力
lumber body || 原木运输车
lumen || 流明(光通量单位)(lm)
lumen bronze || 流明青铜合金(Zn 85%～88％，Cu 4％～10％，Al 2％～8％)
lumen equivalent || 流明当量
lumen hour || 流明一小时
lumen meter || 照度计，流明计
lumen method || 流明法
lumen sensitivity || 流明灵敏度
lumerg || 流末格(光能单位)
lumeter || 照度计，流明计
luminaire || 照明器
luminaire making machinery || 灯具制造机械
luminance || 发光率，照度，亮度
luminance channel || 亮度信道
luminance coefficient || 亮度系数
luminance delay || 亮度延迟
luminance efficiency || 发光效率
luminance fluctuation || 亮度起伏
luminance image restoration || 亮度图像恢复
luminance range || 亮度范围
luminance sensor || 亮度传感器
luminance temperature || 亮度温度
luminance threshold || 亮度阈
luminance transducer || 亮度传感器
luminescence || 发光，磷光，荧光，生物光，冷光
luminescence efficiency || 发光效率
luminescent activator || 发光活化剂
luminescent bacteria || 发光细菌
luminescent center || 发光中心
luminescent concentrator || 荧光聚光器
luminescent crystal || 发光晶体
luminescent device || 发光器件
luminescent effect || 发光效应
luminescent gas || 发光气体
luminescent intensity || 发光强度
luminescent material || 发光材料，发光物质
luminescent plastics || 发光塑料
luminescent screen || 发光屏，荧光屏
luminescent spectrum || 发光光谱
luminescent spot || ①光点②亮点
luminescent substance || 发光物质
luminometer || 光度计，照度计
luminophor || 发光体
luminosity || 发光度，亮度，发光本领，光度
luminosity class || 光度型
luminosity classification || 光度分类
luminosity curve || 发光度曲线
luminous beam || 光线，光束
luminous body || 发光体
luminous density || 发光密度
luminous dial || 发光(刻)度盘
luminous diode || 发光二极管
luminous effect || 光效应
luminous efficacy || 光视效能
luminous efficiency || 发光效率，光视效率
luminous element || 发光组件
luminous emission || 光发射
luminous energy || 光能
luminous flux || 光通量
luminous flux density || 光通密度
luminous flux measurement || 光通量测量
luminous intensity || (发)光强(度)
luminous intensity measurement || 光强(度)测量
luminous material || 发光材料，发光物质
luminous mechanism || 发光机制
luminous power || ①发光能力，发光本领②发光功率
luminous quartz || 发光石英
luminous radiation || 光辐射
luminous ray || 光线
luminous sensitivity || 感光灵敏度，感旋光性，光照灵敏度
luminous sign || 发光标志
luminous source || 光源
luminous spot || 光点
luminous standard || 光度标准
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