The first test they carried out was one used by most government authorities, which involves swabbing an earring with a solution containing ammonia and dimethylglyocime.
BBC: Earring
Injected into the exhaust stream, the solution's ammonia reacts in the de-NOx catalyzer to form nitrogen and water vapor.
WSJ: 2013 Porsche Cayenne Diesel Review: Only Geeks Need Apply | Rumble Seat by Dan Neil
应用推荐
模块上移
模块下移
不移动