“The development of surface of an object means the unrolling and unfolding of all surfaces of the object on a plane"
In industrial world, an engineer is frequently confronted with problems where the development of surfaces of
an object has to be made to help him to go ahead with the design and manufacturing processes. For example,
in sheet metal work, it plays a vital role, thus enabling a mechanic to cut proper size of the plate from the
development and then to fold at proper places to form the desired objects, namely, boilers, boxes, buckets,
packing boxes, chimneys, hoppers, air-conditioning ducts etc.
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