Extract Digits with relevant characters

Hi,

I have a list (col. Q) of items incl. other parameters - such as:

18 Kg Cement
7/32" Screw
Wooden board board 4.5"/5.5"
12.34 meters wire

In general I'm looking for a Sheet Formula (no UDF - which I already wrote) in order to extract the Numeric Digits(0,1,2,3,4,5,6,7,8,9) AND all relevant characters.

Requested returns:
18
7/32"
45"/5.5"
12.34

In fact I would like to extract CHAR(35) up to CHAR(64)

What will be the formula to achieve that ?

Thanks, Elm