What is the principle of the arm boom of the boom-type truck crane?
Telescopic cylinder mainly from the lifting arm expansion and contraction,
Synchronous expansion and contraction using a single cylinder plus wire rope, pulley components to achieve expansion and contraction
Sequential expansion and contraction using multi-stage cylinder or a number of single-stage cylinder, etc. directly with the cylinder to promote
There are two ways in which the boom is extended and retracted; sequential telescopic and synchronous telescopic
