lowbelln.小铃lowadj.低的；少的；低落的；低声的；卑劣的；低等的adv.低地；低声地；低下地；廉价地n.低水平；低价；低谷v.哞哞叫low pulsating sedimentation低脉动沉淀low permeability reservoirs低渗透油藏low strain integrity tesing低应变检测Low Frequency Active Sensor低频活跃感应器low level ejector condenser低水平喷射冷凝器low-pressure safety valve低压安全阀low-pass frequency filter低通滤波器low-resistivity reservoir低阻油层low temperature application低温施工low carbon structural steel低碳结构钢