The containers should be made of dark glass or fired clay. Containers made of iron or copper will ruin fats and oils.
容器应由深色的玻璃或陶瓷做成，因为铁制或铜制的容器会使油脂变质。
Pottery drum, also known as drum soil, clay is fired into the dark box, and then cast made of animal leather.
陶鼓又称土鼓，是用陶土烧制成鼓框，再蒙上动物的皮革做成的。
The dark green silty clay in Shanghai is a bearing stratum for pile foundation.
上海暗绿色粉质粘土是上海桩基础的持力层。
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