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

Modification method of halogen-free flame retardant nylon 66 composition and nylon 66