Add spaces: Continueuntilpiecemeasures73(75)cm.

Answer: Continue until piece measures 73 (75) cm.

Add spaces: Mobilephonesandothermonitorsaredisruptiveforbothyouandotheraudiencemembers.

Answer: Mobile phones and other monitors are disruptive for both you and other audience members.

Add spaces: AnairdistributionsystembyKEFibertecisanoptimumsolutiontoensureagoodandhealthyindoorclimateforourschoolchildrenandwhichisalsoenergy-efficient.

Answer:
An air distribution system by KE Fibertec is an optimum solution to ensure a good and healthy indoor climate for our schoolchildren and which is also energy-efficient.