Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
Inventor
active
Al.sub.2 O.sub.3 based ceramic
Al.sub.2 O.sub.3 Based ceramics
Apparatus for alternately arranging the direction of an article
Apparatus for manufacturing tobacco filter
Camera with optical axis bending optical system
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