The main reasons for packing in wooden cases are as follows: the vehicles may shake during transportation, which will inevitably lead to bumps, while the wooden case is hard, which can avoid deformation and paint falling of chain block. It can also better protect the equipment during cargo transportation, loading and unloading. In addition, wooden case packaging has a certain moisture-proof effect, which can reduce the incidence of equipment rust, and external impurities will not contact the equipment, effectively avoiding equipment rust and damage.