iris photometer造句

例句与造句

1. The first instruments of the observatory were a 15-cm Unitron telescope, a Foucault pendulum and an Iris photometer.
2. The scientific studies were carried out in the beginning with a radio telescope produced by the Dutch PTT, a 5 cm astrograph, a 15 cm Zeiss from Germany for solar observations, a Hilger and Watts microphotometer and a Cuffey Iris photometer.
3. It's difficult to find iris photometer in a sentence. 用iris photometer造句挺难的