黄 色成年 人免费观看,花野真衣影视先锋,大泽麻奈美,久久国产精品超级碰碰热,电影人成天堂,三级黄色小视频免费

optek-Danulat GmbH was founded in 1984; - Provides high-quality, reliable, long-term stable operation optical instruments; - Products include multi-function controllers and different types of sensors; - Widely used in biotechnology, chemical industry, petrochemical, papermaking and other fields; - Optek's products comply with international standards and industry standards; - Provide excellent pre-sales and after-sales services and technical support; - There are more than 30,000 application examples around the world.

Main product series

Multi-function controllers, turbidity sensors, color sensors, UV sensors, probe sensors, electrode adapters, conductivity sensors, etc.