but they shrink at different rates, which makes the black cupric oxide flake off .
但是,他们在不同的收缩率,从而使黑色铜氧化物片赶走。
as the copper cools, it shrinks. the black cupric oxide also shrinks. but they shrink at different rates, which makes the black cupric oxide flake off.
由于铜冷却,它缩小。黑色铜氧化物也缩小。但是,他们在不同的收缩率,从而使黑色铜氧化物片赶走。
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.