Cranes Gantry folding-npab

Folding-npab siab crane yog ib tug crane, yog ib kev, suab sib quas ntus tshuab. Ib hlis no: extract hauv pem teb tus nyom thiab level rau ntawm daim kev cai tswjhwm qhov chaw nws txo qis, ces kom rov qab xa, siv cov ntaus hauv tsev, rau lub hlis tom ntej. Feem ntau lifting ua hoist mechanism (khoom zog soom), mechanism (tso cai rau cov crane txav), luffing thiab slewing mechanism (Tshooj rau cov kab rov tav no), nrog rau lub cev hlau, fais fab, tswj thiab ntu thaum lawv tseem yuav tsim nyog.