stiff leg derrick

斜拉杆的英... ... counter diagonal 副斜（拉）杆 stiff leg derrick 刚性柱架；斜拉杆式起重机 Pratt truss 普拉特桁架；竖斜杆桁架 ...

漂漂丑娃娃的博客 -... ... stiff girder connection 加劲梁节点 stiff leg derrick 定脚起重杆 stiff mud brick 硬泥砖 ...

直角三角形_馆档网 ... "阀胶著"," sticking of valve" "定肢起重杆"," stiff leg derrick" "加强件"," stiffener" ...