轨道式门式起重机
rail-mounted gantry crane
轨行式门式起重机
rail mounted gantry cranes
轮胎式门式起重机
rubber-tired gantry crane
便携式产氧袋
portable oxygen generation bag
测试模式产生器
total scatteringtest pattern generator
产前暴露迟发效应
Prenatal exposure delayed effects
产前超声检查
Prenatal ultrasonography
Ultrosound exposure to pregnant women
Prenatal ultasonography
产前超声筛查
Prenatal ultrasound scans
产前超声预测
antepartum ultrasonic prediction