51.   The letter, however, carried a strong demand that Pyongyang guarantee nuclear transparency and accept reactors designed by South Korean engineers, the spokesman said.

52.   The North Koreans have balked at accepting the reactors from their southern foe, maintaining the quality of the goods on offer was not recognised internationally.

53.   The North Koreans have held out against accepting reactors from their southern foe, maintaining there was no international guarantee of their safety.

54.   The North Koreans have held out against accepting reactors from their southern foe, maintaining there was no international recognition of the quality of the goods on offer.

55.   The North Koreans have held out against accepting reactors from the South, maintaining there was no international guarantee of their quality.