1. Sheet metal forming processes play a key role in the manufacturing industry and this needs continuous development in materials, processes, tool design and equipment manufacture.
2. Sheet metal forming processes play a key role in the manufacturing industry and this needs a continuous development in materials, processes, tool design and equipment manufacture.
Among the above two which one is appropriate sentence?
#1. ie a continuous development But what does 'this' refer to? '
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#1. ie a continuous development
But what does 'this' refer to? Does it refer to industry, or role, or processes?'