The growth of China's industrial value-added output was up 13.4 percent in July year on year, 0.3 percentage points down from June, the National Bureau of Statistics (NBS) said on Wednesday.

Industrial value-added output, the key measure of manufacturing production, posted a 17-percent year-on-year growth in the first seven months, down 0.6 percentage points from the first-half figure, said Sheng Laiyun, a spokesman with the NBS.

Industrial value-added output for heavy industries from January to July climbed 13.3 percent from one year earlier, and that for light industries was up 13.5 percent, said Sheng.

All 39 industries saw year-on-year growth in July, with textiles up 11.1 percent; chemical materials and products up 13.7 percent; general equipment manufacturing up 21 percent, and transportation equipment manufacturing up 15.9 percent, said Sheng.

The output of 413 industrial products increased year on year in July, with crude oil production up 6.4 percent; power output up 11.5 percent; and crude steel production up 2.2 percent, said Sheng.

The growth rate of China's industrial value-added production has declined for five consecutive months since it hit 20.7 percent in the first two months.

Boosted by the government's economic stimulus measures, industrial value-added output seen double-digit monthly growth since June 2009.