Q. [rɣ], [lɣ] became [rr], [ll]; [rɣ|lɣ] > [rr|ll]

Reference ✧ PE19/93

Phonetic Rule Elements

[rɣ] > [rr] ✧ PE19/093.3002 (rg > rr)
[lɣ] > [ll] ✧ PE19/093.3003 (lg > ll)