r"
^(?P<unit_type>SL|SV)(?P<unit_size>6)(?P<mounting_type>P)(?P<decompression_feature>A|B)(?P<cracking_pressure>1|2|3|4)(?P<sep_1>-)(?P<unit_series>6X)(?P<sep_2>/|=)(?P<surface_coating>J50|)(?P<seal_material>V|)(?P<additional_details>(.|[0-9])*)$
"
gm