必要的

Determine the absorbances of the solutions from the Standard Solutions and the Test Solution at 595 nm, with a suitable spectrophotometer (see Spectrophotometry and Light-Scattering 851 ), using the Blank to set the instrument to zero.

吸光度确定的解决办法的标准解决方案和测试解决方案在595纳米，与一个合适的分光光度计（见光谱和光散射851 ），利用设置空白文书为零。

G# _377 Bolt (screw, nut, stud, spring washer, pin, ball bearing, roller bearing) is the most commonly used machine part.

螺栓（螺钉、螺帽、双头螺栓、弹簧垫圈、销、滚珠轴承、滚柱轴承）是最常用的机械零件。