This paper presents the chemical compositions, phase constitutions, and absorbing behavior produced by new techniques, such as vacuum melting, powder rolling.
本文介绍了采用真空熔炼、粉末轧制等新工艺生产的消气剂产品的化学成分、相组成和吸气特性。
The present invention discloses one kind of rolling brush connecting structure for vertical vacuum cleaner as one hand supported vacuum cleaner.
本发明公开了一种立式吸尘器的滚刷连结结构，属于用手支撑的 吸尘器的结构。
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