pond scum
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Study of CuS04 Solution on Controlling Pond Scum
硫酸铜防治绿藻试验
air-flotation scum
气浮浮渣
soap scum
皂垢
scum valve
浮渣吹泄阀
scum thread
浮线
跳纱
scum rubber
泡沫橡胶
Scum Removal
刮渣
scum pump
泥浆泵
浮渣泵
泥渣泵
scum pipe
浮滓管
scum period
刮渣周期
scum pan
浮滓盆
scum of a community
败类
scum hole
出渣孔
Scum Gate Valves
排渣闸阀
scum dish
浮滓皿
scum defect
表面浮松
Scum Collection System
浮渣收集系统
scum cock
浮滓旋塞
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