Before starting the bending operations the hydraulic pressure / water level / flow switches etc. are checked. The pipe is now heated by induction to the temp of 815 - 995 C. By pushing the pipe by push clamp the bending of the pipe is started slowly and carried out at speed of 10 - 40 mm/min. The bending operation is stopped at the specified angle of bend and predetermined arc length.
For example; 'income' is a variable that can vary between data units in a population (i.e. the people or businesses being studied may not have the same incomes) and can also vary over time for each data unit (i.e. income can go up or down). A continuous variable is a numeric variable.
Definition: Variable costs are production costs that change in proportion to the amount of goods that are produced. In other words, for every good that is produced, variable costs increase by the same amount. In any production process, manufacturers incur a variety of costs. Cost accountants and managers usually split these costs into two main categories: variable costs and fixed costs. Example A good example of variable costs for a piano manufacturer is the cost of piano keys.