NLDONational Long Distance Operator (telecommunications)
NLDONaso-Lacrimal Duct Obstruction
References in periodicals archive ?
The charges to be paid by an access provider to the NLDO to cover the cost for carrying inter-LSA calls are called carriage charges.
1% of NLDO cases, represent mucinous distention of the lacrimal sac, with mucinous material secondary to congenital obstruction of the nasolacrimal apparatus both proximally and distally.