
OPTICS AND PHOTONICS - ENVIRONMENTAL REQUIREMENTS - TEST REQUIREMENTS FOR TELESCOPIC SYSTEMS (ISO 20711:2017)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
OPTICS AND PHOTONICS - ENVIRONMENTAL REQUIREMENTS - TEST REQUIREMENTS FOR TELESCOPIC SYSTEMS (ISO 20711:2017)
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻