Add spaces: Beforeindicatinghiscontributiontothesecondoftheseareaswegivesomebackground.

Answer: Before indicating his contribution to the second of these areas we give some background.

Add spaces: Availableinsteelandstainlesssteel.

Answer: Available in steel and stainless steel.

Add spaces: ThemajorityofourproductsaremanufacturedinHanover,whichhasanextensiverangeofmachineryandequipment(punches,plotters).

Answer:
The majority of our products are manufactured in Hanover, which has an extensive range of machinery and equipment (punches, plotters).