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Ecology
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English
Chinese
Centrifugal fans with backward curved blades are used primarily for intake suction and do
not
require a scroll housing
有后倾弯曲叶片的离心式鼓风机主要用于吸气,并且不需要涡室外壳
cheapest available technology
not
involving prosecution
CATNIP
不涉及诉讼的最廉价可行技术
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