Today 8.00 AM . Analysts have analyzed the concentration K2O with Atomic Absorption Spectrophotometer . He check pressure gauge of acetylene gas found that does not apply. Mechanical section change the new pressure gauge . In time 10.30 AM. Mr.Kritrat have analyzed the concentration K2O with Atomic Absorption Spectrophotometer . Suddenly. , The Atomic Absorption Spectrophotometer explosions . Nobody has injured.