, market the brand on the hood of the display booth situation to some extent reflects the strength of various models. Top suction hoods not only occupy more than half of European machine booth, and most are arranged in a prominent position, the number of Chinese-style machines from the location could not contend with the European aircraft, but apart from some main or main side of the suction aspiration hood of the enterprises, the major brands are more difficult to find the booth side suction hood figure.