drag conveyor
牵引运送机
拖曳式运送机
刮板运输机
刮板输送机
下向楔形抽心孔式
下向楔形割眼式
adjustable shaft bearing
circle reverse control worm shaft bearing
bearing bearing of pile
桩的承载力
聚对苯二甲酸乙二醇酯(PET)
聚对苯二甲酸乙二醇酯
coastal front coastal front trapped wave
sloping delta front and basin delta front
additive drag coefficient
Aerodynamic drag coefficient