The grave goods included few weapons and little evidence of social stratification.
It also expands the 45-day removal provision to include other weapons and drugs.
But officials said the sales did not include high-grade explosives or heavy weapons.
He said any arms control must include conventional weapons.
But drills that include weapons of any kind will not be permitted.
They include weapons, armor, works of arts and technology.
These need to be expanded to include nuclear weapons also.
None of the items included military systems or strategic weapons, he said.
Big O's original design included interchangeable weapons for the robot's arms.