Question about Air Ventilation System indoor subway?

Question

Hi friend

I want information about: use Ionizer in ventilation system indoor wagons of subway

Answer 1

Dear Friend,

Your english needs a little polishing...not clear on what you want to know?

indoor=inside?

ionizer=ionization filter?

wagons=cars?

Answer 2

I can't speak with much authority on undergrounds, but in US freight operations, where tunnels can reach much, much more than 2 miles in length (I believe the longest in the US is somewhere around five miles long), there are blower systems that keep the tunnel free of noxious and deadly fumes.

In addition, in the air brake rules sections of rule books, there are measures that must be taken when passenger trains are stalled in tunnels.

Ionization is a way to separate particulate matter from the air by charging them electrically (ionization), then collecting them on a grid of opposite polarity.  The home air freshener called the "Ionic Breeze" operates in the same fashion, just on a smaller scale.  So it makes perfect sense that this technology is employed in underground rail systems.

Pay no attention to the insensitivity of the clod above.  These kinds of comments usually come from one in a category they know nothing about, but just have to weigh in anyhow.  By way of example, if he knew anything about it, he would know that the terms, carriage, wagon, coach, car and buggy are all interchangeable terms.  It just depends on what part of the world one is in, as to how one refers to them.

So, how's my English, Capt.?