Add punctuation: Then our team of sports scientists serious athletes and service technicians of many years of experience evaluate the products of different categories
A: Then our team of sports scientists, serious athletes, and service technicians of many years of experience evaluate the products of different categories.

Add punctuation: 15 mm aluminium sheet 15 mm aluminium sheet
A: 1,5 mm aluminium sheet 1,5 mm aluminium sheet

Add punctuation: Source for 3x3 watts 24 watt manufacturers at zhongshan karnar lighting electron factory
A:
Source for 3x3 watts 24 watt manufacturers at zhongshan karnar lighting & electron factory.