The none-motile alternately working two-pot device is a new type of the alternately working one, which is the individual invents of researcher Zeng Xiangwei.
非能动双罐交替工作装置是一种新型的双罐交替工作装置，是曾祥炜研究员的个人发明。
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This article introduces some requirements of aviation electric apparatus to packing materials and a two-pot polyurethane foam pouring compound for this purpose.