CG1-30 portable cutting machine is an universal gas cutting machine, which uses medium-pressure fuel gas and high-pressure oxygen to cut the plate which thickness is more than 8mm. It mainly be used for straight-line cutting. It also can be used for circle cutting with diameter more than 200mm. Bevel cutting and V-shape cutting as well. If equipped with special attachments, the machine may be used for flame quenching and plastic welding by taking use of it drive.