* Steel demand firm in southern China -trader
* Iron ore, coke futures firmer after Thursday losses
By Manolo Serapio Jr
MANILA, Dec 15 (Reuters) - Chinese steel futures cut losses and rebounded from a one-week low on Friday, supported by tighter supply due to government-imposed production curbs as part of a campaign to rein in pollution during winter.
Steel output in China, the world's top producer, dropped to the lowest in nine months in November because of the winter cuts that will be in place through March, data showed on Thursday.
The most-active rebar for May delivery on the Shanghai Futures Exchange was down 0.3 percent at 3,807 yuan ($576) a tonne by midday, but well off the day's low of 3,770 yuan, its weakest since Dec. 7.