The materiel of transferred is flowing only in the rubber tube, and keep clear of other parts of peristaltic pump. So avoid the touch pollution.
被输送的液体只是在胶管里流动，与泵的其他零件不相接触，从而避免了接触污染的可能。
The natural rained dust not touch, can effectively prevent the pollution.
经自然雨水冲洗尘埃不沾，能有效地防止污染。
The audience can select and learn about "interior decoration pollution and preventive measures" or "enter the household models" through the touch screen.
观众通过触摸屏选择了解“室内装修污染及防范措施”或“进入家居模型”。
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