光触媒 (hikari shokubai)

photocatalyst 

a photocatalyst 

半導体光触媒 (handoutai hikari-shokubai)
semiconductor-based photocatalysts

digi-joho JAPAN
Business/Living  Tips and Ideas

digi-joho TOKYO
Tokyo Travel Tips and Ideas

© eigo-samples by digi-escape inc. All rights reserved