ˌfine-tooth ˈcomb BrE AmE noun
go through/over something with a fine-tooth comb to examine something very carefully and thoroughly:
The police went over the scene of the crime with a fine-tooth comb.
ˌfine-tooth ˈcomb BrE AmE noun
go through/over something with a fine-tooth comb to examine something very carefully and thoroughly:
The police went over the scene of the crime with a fine-tooth comb.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012