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Eigenwasserversorgung: 2 Treffer
Photometrisch == * [[https://reefdepot.de/hanna-instruments/2220-meerwasser-aquaristik-hanna-instruments-mini-photometer-checkerr-hc-fur-eisen-hi-721.html?gclid=CIegy53b-
Wetterstation: 2 Treffer
ISO9060:1990: Specification and classification of instruments for measuring hemispherical solar and direct sola... ging the Sun Down to Earth: Designing Inexpensive Instruments for Monitoring the Atmosphere, [[https://www.amaz