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| 11. | Drawer bodies will have bottom and sides formed into one piece center section. |
| 抽屉底部和两边为单片设计。前、板面为点焊。 |
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| 12. | each slit add constructively; this produces the bright white light you see as the zeroth order at the center |
| 在零级位，从栅格标本的各个窄缝中发出的所有波长会产生相加的干涉，在物镜的后焦面中心会看到明亮的白色像。 |
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