QUESTION: Fix punctuation: Oyster 26 mm steel yellow gold and diamonds
ANS: Oyster, 26 mm, steel, yellow gold and diamonds

QUESTION: Fix punctuation: A complete fully operational endofline chain will be built and during the fair visitors will be able to follow the demonstration around the demo plant
ANS: A complete, fully operational, end-of-line chain will be built, and during the fair visitors will be able to follow the demonstration around the demo plant.

QUESTION: Fix punctuation: The VDP German VDP found on 278 the big plants 2006
ANS: The VDP (German VDP) found on 27.8. the big plants 2006.

QUESTION: Fix punctuation: The change of seasons is under the influence of two monsoons each separated by a transition month
ANS:
The change of seasons is under the influence of two monsoons, each separated by a transition month.