Speaking at the meeting in Rio de Janeiro, Guido Mantega, the Brazilian finance minister, said the accords should provide an increase in manufacturing and sales in China by the Brazilian airplane maker Embraer.
Embraer, one of the largest manufacturers of regional planes, for years was barred from producing jets in China, the world’s fastest-growing market for commercial and executive aviation.
The deals were reached as Ms. Rousseff, a pragmatist, was pressing China to buy more products from Brazilian manufacturers as part of a broader push aimed at reducing the South American nation’s dependence on sales of raw materials like iron ore, oil and soybeans.
China, the world’s second largest economy, after the United States, is Brazil’s biggest export market.
The economies of Brazil and China have slowed sharply, partly because of the European debt crisis.