Ground-test results show that cupric oxide or cuprous oxide formed on the surface of copper may break off by atomic oxygen impacting, to contaminate other surfaces.

• 地面试验结果表明：生成的氧化铜或氧化亚铜在原子氧撞击作用下，从试样表面脱落，并沉积到其他试样的表面，从而对其他表面产生较为严重的污染。