沈船浮标 wreck buoy

沈船装灯浮标 wreck light buoy

浮式沈箱 floating caisson

浮沈箱门 Floating caisson gate

星海浮沈录 A Star Is Born

浮式沈箱码头 floating caisson type wharf

浮式沈箱靴 Floating caisson shoe

远心沈淀浮集法 centrifugal floatation method