Insight - Innovative Portuguese exporters boom despite bust at home

LISBON (Reuters) - From the rattle of weaving looms and footwear stitching machines in northern Portugal to the rumble of trucks shipping high-quality paper across the eastern frontier, the nation's export firms are buzzing with activity despite three years of economic crisis at home.

Relying on innovation, diversification and wages that are lower even than in Greece, small and medium-sized manufacturers have turned to markets stretching from China to Portugal's booming former colony of Angola to survive - and often thrive.