The oxygen in high-pressure and small-volume cylinder and soluble acetylene in small-volume cylinder are easy for carrying; they are mainly used in overhead operation, small working space and the work of little quantity.

• 小容积高压氧气钢瓶和小容积溶解乙炔气钢瓶气体，其便于携带、主要在高空作业、狭窄埸所和工程工作量少的地方使用。