In terms of quantity, 11,272 machines (including nitrogen machines) that were not listed as liquefied air or other gases were exported in 2005, and 9,167 were exported in 2006, an increase of -18.7%. In 2007, the export of 11,306 units, an increase of 23.3%; In 2008, the export of 2794 units, an increase of -75.3%; In 2009, 2,564 units were exported, an increase of -8.2%.

In 2005, the export amount of China's unlisted liquefied air or other gas machines (including nitrogen machines) was 6,069,199 US dollars, and the export amount in 2006 was 21,117,530 US dollars, an increase of 264.4%; In 2007, the export value was 49,405,28 US dollars, an increase of 134%; In 2008, the export value was 98,638,310 US dollars, an increase of 99.7%; In 2009, the export value was 64,963,386 US dollars, an increase of -34.1%.

China's nitrogen machine market prospects survey and analysis report shows that China's nitrogen machine brands operating overseas markets are mainly: Troy, Hangzhou Oxygen, Kaikong, Chuanair, Suzhou Gaopu, Nantong Jiayu, Hangzhou Boda and other enterprises.

In 2005, China imported 993 machines (including nitrogen machines) that were not listed as liquefied air or other gases, and 700 were imported in 2006, an increase of -29.5%. In 2007, 611 units were imported, an increase of -12.7%; In 2008, 414 units were imported, an increase of -32.2%. In 2009, 262 units were imported, a year-on-year increase of -36.7%.

In 2005, China's not listed liquefied air or other gases of the machine (including nitrogen machine) import amount was 48,138,21 million US dollars, in 2006 import amount was 39,791,185 million US dollars, an increase of -17.3%; In 2007, the import amount was 17,434,360 US dollars, an increase of -56.2%; In 2008, the import value was 26,065,840 US dollars, an increase of 49.5%; In 2009, the import amount was 89,647,02 US dollars, an increase of 243.9%.

China's imported nitrogen machine brands are mainly Linde, Air France, BOC, Praxair, Messer and other brands. The change in the quantity of nitrogen machine imports in China is not too large, but the change in the amount of imports is large, indicating that the unit price of imported products is relatively large, especially in 2009, the whole year is in a violent shock trend, the international economic situation has a greater impact.

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