Question: These are complemented by design elements such as guilloche decoration and a gently curved case
Please fix the punctuation.
Fixed: [These are complemented by design elements such as guilloche decoration and a gently curved case.]

Question: Enemy panzers have broken our lines and occupied a city of strategic importance
Please fix the punctuation.
Fixed: [Enemy panzers have broken our lines and occupied a city of strategic importance.]

Question: Mold can begin growth in as little as 24 hours
Please fix the punctuation.
Fixed: [Mold can begin growth in as little as 24 hours.]

Question: 15 mm aluminium sheet 15 mm aluminium sheet
Please fix the punctuation.
Fixed:
[1,5 mm aluminium sheet 1,5 mm aluminium sheet]