半开式离心泵叶轮
semi-open type centrifugal pump impeller
粒子中心检测
particle centroid detection
砾石土心墙堆石坝
rock fill dam with gravel-soil core
gravel soil corewall rockfill dam
沥青混凝土心墙石渣坝
asphalt concrete core rock-debris dam
沥青混凝土心墙堆石坝
rockfill dam with asphalt-concrete core
Rockfill Dam with Asphalt Concrete Core
沥青混凝土心墙坝
embankment dam with asphaltic concrete core
asphalt concrete central core dam
asphaltic concrete core dam
asphalt concrete core dam
连续式井壁岩心切割器
continuous sidewall core cutter