国家/地区
IPC部 D（2）
IPC大类 D01（2）
IPC小类 D06B（2）
IPC
发明人
公开年 2022（2）
申请年
专利权人

Preparing composite fiber warp knitted fabric useful in textile field, comprises e.g. adding natural graphite powder and sodium nitrate into beaker, slowly pouring sulfuric acid into the beaker and slowly adding potassium permanganate powder.

SHI M, LIN H, LIN J

Hemp non-woven mask comprises a filter unit for filtering contaminants, and an inner cover made of hemp nonwoven fabric provided on one surface of the filter unit to be in contact with the user's face.

LEE B S, KIM M