Some in the wireless industry say technological difficulties are to blame.

Because it is a problem of great technological difficulty, requiring the services of the best scientific talent available.

Proponents acknowledge the technological difficulties, but say the system will eventually work and could offer protection against a rogue or accidental missile attack.

It has been accompanied by extreme scientific and technological difficulties, but has resulted in progress.

We recognize the technological difficulties we face, and we look forward to the challenge.

This had many reasons, first and for most though competition, in addition to some technological difficulties.

We have faced the same technological difficulty on our side, Captain Scott.

So far, the costs and technological difficulties have kept such trains from being used in a big way.

Since the main task of aircraft was seen as directing artillery fire, he seemed to be best qualified to solve the technological difficulties involved.

At a hearing last week, electronic industry representatives acknowledged that the idea poses no technological difficulty.