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Ecology
containing
有用的
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对环境有指示作用的生物指示品种
biological indicator species
有凝结作用的
coagulative
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
Centrifugal fans with backward curved blades are used primarily for intake suction and do not require a scroll housing
有磨蚀作用的
abrasive
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