安全阀控制提动头
relief valve control poppet
安全阀主提动头部分
relief valve main poppet section
半自动提取
semi-automatic extracting
Semi-automatic Extraction
Semi-automation Extraction
Semiautomatic extraction
棒的间提出
intermittent rod withdrawal
车牌定位并提出
vehicle license plate location
城镇信息自动提取
Automatic retrieval of Urban Residential Areas
道路半自动提取
Semi-automatic Road Extraction