PHNOM Penh’s Small and Medium Industry Association closed a three-day exhibition on Cambodian products Sunday that showed local businesses have improved production, said Heng Heang, head of the association. “We also see that producers understand how to make high-quality products and have upgraded packaging that can be substituted for imported ones,” he said Friday at the opening. The Buy Cambodian Products 2010 exhibition, held in front of Wat Botum from Friday until Sunday, brought in 80 participants. Although Cambodia’s main sectors, especially garment exports, have struggled, experts say more development in small and medium-sized businesses could help dampen the effects of the downturn.