If you are searching for a range of numbers and the search is actually to be carried out as a number search, you must enclose the search string in square brackets, e.g. D=[10-12]. If you omit the brackets, a textual search will be performed.
D=[10-12] [10-20]
Brackets are already used for the "Number search with units", so that both options can also be combined.
D=[1-2 inch]
3Dfindit: Result in mm (an automatic conversion to mm is executed, so that fitting results are also found for mm)
PARTdataManager: Result in mm (an automatic conversion to mm is executed, so that fitting results are also found for mm)
[10-20 mm] 30[mm] [10 mm]
