用“hopper dredger”造句大全，hopper dredger造句
Basedonthesequentialquadraticprogrammingmethod,athrustallocationforthetrailingsuctionhopperdredgerwaspresented.Thepaperintendstoprovethattheintactstabilityofahopperdredgerinpartloadconditionisbetterth...
用“hopper car”造句大全，hopper car造句
Thefreightcarwastankcarsandthehoppercarsthatpiledupcokes.SomekeytechnicalpointsindesignofthelockingmechanismonhoppercarsatpresentinChinaareanalyzedanddiscussed....