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airtight sealed

airtight sealed

airtight sealed

airtight sealed

1

airtight sealed metal container for food or drink or paint etc. . .

放食物、饮料或颜料等的密封的金属容器。

2

Measurement and compensation for refractive index of air using a pre-evacuated airtight sealed cavity

用预抽气真空腔法测量及补偿空气折射率的研究

3

General operation adopted with airtight sealed bearing to alow long ours rotation ;

通用型塑料粉碎机，采用密封轴承，使轴承转动长时间保持良好；

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