I downloaded the daily Bhavcopy from NSE. It has two coloums with these headers :
TRADED_QUA
TRD_NO_CON
What does each represent ? explain plain english please.
Which of these two is similar to VOLUME in equities?
You can download and see it here:
https://www.nseindia.com/products/content/derivatives/equities/homepage_fo.htm
Thanks for your time.
For the above
TRADED_QUA means Traded Quantity of the particular stock/contract
TRD_NO_CON means Traded Number of contracts ( number of lots)
Trader,
TRADED_QUA is the total traded quantity. TRADED_QUA = TRADED_CON x lot size.
Most trading platforms will show you TRADED_QUA in the field that volume traded for equity is shown.
Ahh! Got it 
TRADED_QUA / TRD_NO_CON = LOT SIZE !!!
Thank you.