One more add-hot-water-and-stir military genius!
If you had bothered to learn, my service was in aerospace and software for avionics. I do know a little bit, more than some smart-alec on an internet forum, about government procurement policies. A substantial amount of balancing equipment and ammunition are built into the purchase price; amounts are decided by the service people, not by the defence procurement staff.
A hyperbaric oxygen tank is needed for troops that have not gone through acclimatisation, a perennial problem with the PLA that has a policy of re-deploying troops from a central point or central points within military districts to that point on the borders where they are needed in each case. We have all seen propaganda pictures of soldiers in full uniform sitting in civilian airliners; such troops rushed in at short notice are not acclimatised, and need this equipment to stay alive. Please take the trouble of finding out the normal process of acclimatisation that Indian Army troops go through on deployment to a high altitude location. They are given several weeks to acclimatise.
So now you know what hyperbaric tanks are for.
Our soldiers died of exposure to extreme low temperatures, and to remaining unrescued in mountain streams after the assault on them by Chinese Border Guards. Hyperbaric tanks would have done nothing for them.
It is really surprising when people with little or no knowledge offer resounding technical opinions about a situation that they know nothing about, concerning an opposing army that they know less than nothing about.
If you have a point to make, make it, by all means. Do not repeat something I have said with an air of incredulity. By now, we have learnt that when you don't know what to say, you just use words as a smokescreen. It doesn't work after the first two or three times.
T72 tanks are designed from the first sketch onwards for operation in cold conditions. Those that we have in the desert actually have to be modified for hot weather conditions. These Russian tanks, the T-72 and the T-90, are actually in terms of temperature compatibility very well-suited to conditions in Ladakh.
The PLA GF needed a light tank for no other reason than for their need to be able to airlift tanks and other mobile equipment to a point of need. It has nothing to do with a high plateau. Try not to be fooled by your own propaganda.