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A Renewable Air Purification Material and Its Preparation and Regeneration Methods

A fixture, air purifier and method of maintaining balance

Composite air filter and its manufacturing method

Polypropylene plastic and its preparation method

A kind of activated carbon based adsorbent material for carbon sandwich fabric and its preparation method

A skin-core composite monofilament and its preparation method and use

Liquid charging method and device for electret material

Devices and methods for measuring Mesh lifetime

Screen mesh, preparation method and application