beckman spectrophotometer造句

例句与造句

1. As advertised in the 1941 News Edition of the American Chemical Society, the Beckman Spectrophotometer used an autocollimating quartz crystal prism for a monochromator, capable of covering a range from the ultraviolet ( 200 millimicrons ) to the infrared ( 2000 millimicrons ), with a nominal bandwidth of 2 millimicrons or less for most of its spectral range.
2. It's difficult to find beckman spectrophotometer in a sentence. 用beckman spectrophotometer造句挺难的