Among them may be present but a few such as carbon monoxide, but apart from that yet the....... ions, what's really finding just only for "case-hardened".
Miongoni mwa Them inaweza kuwa sasa lakini kavu chache kama monoksidi kaboni, lakini mbali na bado Hiyo....... ions, nini kweli tu kutafuta tu kwa ajili ya "kesi ngumu".