... self-doffing worsted spinning frame 自动落纱精梳毛纺细纱机 self-draining filter 自排卸式过滤器 self-elevating barge 自升式平底船 ...
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self-draining filter 自排卸式过滤器
Now we are slowly draining this liquid through filter paper in the pavilion and we almost have our precious indigo pigment.
现在在观心亭里，我们用滤纸过滤液体，就要得到我们珍贵的靛蓝染料了！
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