... and fill it into the low-temperature fire extinguisher.3. GTM-D does not need heating, pressuring, and has many advantages ... , reliable, rapid filling speed, accurate metering, high work efficiency, etc.4. GTM-D is the common type of CO2 filling machine for ... fire extinguisher. Good appearance, good performance, lower price.5. GTM-D is ideal filling equipment for carbon dioxide fire extinguisher ...