The rules that use the category "<bearing_unit-pl>" are:

<bearing_spec>

<bearing_number-pl> <bearing_unit-pl>

<bearing_number-three_dig-pl> <bearing_unit-pl>

<bearing_spec-three_dig>

<bearing_number-three_dig-pl> <bearing_unit-pl>

<bearing_spec-recursive>

<bearing_number-pl> <bearing_unit-pl>