direct extraction meaning in Chinese

直接浸出
直接萃取

Fast algorithm on image transition region direct extraction and segmentation
图像过渡区直接提取与分割快速算法
Summary on copper slag beneficiation and its direct extraction both home and abroad
国内外铜炉渣选矿及提取技术综述
The sudden rise was probably due to change of vehicle class recognition from being visually distinguished by police officers to direct extraction from valid iii through matching of the vehicle registration number
突然上升数字可能由于车辆意外输入方式自99年1月起由警员辨别改为由牌照部根据失事车辆车牌提供