| 摘要 |
<p>Microfilter for medical purposes, e.g. to sterilise air for operating theatres or to produce sterilised water, consists of a foil, made of an inorganic material such as mica with a thickness from 40-100mu, perforated with holes of dia. 0.5-20mu, pref. by a method such as heavy-ion bombardment and etching. Arrangement saves the considerable labour and time required to clean clogged porous porcelain filters. The frequent replacement of cellulose tissue filters is also eliminated.</p> |
