A portable milling machine is simply a machine utilized to machine or mill materials such as metal, wood or plastics. They are very mobile; they can be easily transported to the building site, making them suitable for on-site milling and repair work including the milling of large and complex structures in different sectors of the economy. The portable milling machines are used in construction, aerospace, automotive and maintenance industries where flexibility and accuracy are paramount. They can be utilized for all flat, rounded or irregular shapes with high precision and the versatile applicability of the devices is notable.

Positive displacement pumps mean a type of mechanical machinery used to transport fluids by portioning a specific quantity and expelling it into a discharge pipe.