Working together with motored pump, electric pump or manual pump, this product serves extending purpose. In the event of fire or earthquake or traffic accident, it is used to protect rescuers and victims within dangerous buildings by propping up or fixing dangerous objects before rescue. In the case of traffic accident, it can be used to hold up or put up different parts of the involved vehicle as necessary. Two different models of this series can be used in relay to open a passage for rescue crew to come to the rescue of stranded victims or endangered objects. It is an indispensable tool to fire brigades, traffic departments, industrial and mining organizations and other rescue facilities.