Beijing PERIC Hydrogen Technologies Co., Ltd. owns independent intellectual property rights for H₂ refueling station filling column and unloading column. When H₂ refueling station has external H₂ supply source, H₂ gas usually needs to be transported by tube trailer from H₂ supply source to the refueling station. Filling column’s function is filling H₂ gas from supply source to tube trailer, and unloading column’s function is unloading H₂ gas from tube trailer to H₂ refueling station. Filling/Unloading column can be optionally equipped with a flow meter to measure the amount of H₂ gas filling or unloading. The column can be remotely controlled by station control system and it has emergency shutdown function for safety.