low Ⅱ type concrete bridge sleeper  矮Ⅱ型桥枕

low Ⅱ type concrete sleeper  矮Ⅱ型轨枕

Ⅲ-type concrete sleeper  Ⅲ型混凝土轨枕

boiling type low-pressure deliver unit  沸腾式低压压送装置

cup-type low speed current meter  旋杯式低流速仪

Dioscorea zingiberensis type low-light intensity  弱光生态型盾叶薯蓣

high-low-low temperature  中低低

high-low-low temperature process  中低低

Intelligent Type Low-voltage Circuit Breaker  智能型低压断路器

K-type low pass filter  定K型低通滤波器

LLWL (low-low water level)  低低水位

low bridge  低架桥

Low type frame  低空间

low-bridge  低净空

Low-low satellite to satellite tracking mode  低低跟踪模式

Low-Low Satellite-to-Satellite Tracking  低低卫卫跟踪

low-low water level switch  低-低水位开关

M-B Type Low Carbon High Strength Steel  低碳M-B型高强钢

mean low low water  平均特低水位; 平均较低低潮位

Medium-Low-Low Temperature  中－低－低; 中低低