持续性枕横位
Persistent occiput transverse position
persistent transverse arrest
上下回流式人工湿地
up and down flow subsurface constructed wetland
上行式架桥机
upper-moving erecting machine of bridge span
上行式移动模架
the Up-going mobile Forming Framework
上压式布匹打包机
upper compacted cloth packer
上游式尾矿筑坝法
upstream embankment method
上雨淋式浇口
multi-pen shaped top gating