gantry cranes nrog ib tug nqa tau peev ntawm 50 tons (thawv hom girder) hluav taws xob crane yog tsim loading thiab unloading cov ntaub ntawv nyob rau hauv qhib storagedepots, cov ntaub ntawv yards, railroad freight noj, thiab chaw nres nkoj wharf. Tej zaum kuj muaj ntau yam sib txawv ntawm cov nuv ntses tackles tshwj xeeb los ntawm ntau hom kev ua haujlwm. Tus choj muaj los ntawm ob chav nrom vuam qauv kem.
