国际英语新闻：World's leading industrial expo opens in Hanover, Germany

"The trade fair is a visible proof that we have courageously curbed the (international economic) crisis," Loh said. "Companies have presented many new products, showing that they were working hard to maintain the competitiveness and viability of businesses."

Under the theme of "Efficiency -- Innovation -- Sustainability, " the fair focuses on renewable energy generation and transmission, industrial automation and supply, hybrid and eclectic technology and alternative mobility solutions, as numerous special displays, presentations and panel discussions are to be held during April 19 to 23.

However, as a giant cloud of volcanic ash grounded all the flights in Germany and most of Europe in last four days, many companies were unable to arrive on time.

Deutsche Messe, the organizer said it has sent buses to fetch exhibitors from Europe's main airports, which was a part of " comprehensive package of measures" to limit the impact of air traffic bans on the expo.

Many European guests, such as Scajola and the Spanish delegation, reached Hanover eventually after thousands of kilometers' driving. Some Asian exhibitors had to cancel their plan at last due to the lasting flight control, organizers said.