Because the raw materials are long, and bend. While the machine is rotating centrifugal material are occurring in a range of material bent and during cutting may cause the value of the work are an unstable value OD.
Because the material is long and bent. While the machine is rotating centrifugal material is the material of the cutting and bending can cause the job. OD values are unstable.
Because the raw material is long and bend. While rotating machinery will be in the range of material centrifugal material bend, and in the cutting may make a job OD is unstable.