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。
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The present invention discloses one kind of rolling brush connecting structure for vertical vacuum cleaner as one hand supported vacuum cleaner.