Board cutout不可以作为开孔开槽，此项只能做为绝对参照图体现（3D效果）仅此而已，
不能被转出Gerber元素来作为成形加工的。如需要设计开孔或开槽，请同板框线一个层画，
在[backcolor=#ff0000]Keep-out[/backcolor]层或者[backcolor=#ff0000]机械1[/backcolor]层画出形状。

案例：此文件Board cutout设计


IMAGE: http://https://www.sz-jlc.com/uploadfiles/image/20180919/1537344186581007751.jpg

下图3D效果显示有孔（虚理开孔）


IMAGE: http://https://www.sz-jlc.com/uploadfiles/image/20180919/1537344488766055568.jpg

生成Gerber文件，Board cutout设计元素丢失


IMAGE: http://https://www.sz-jlc.com/uploadfiles/image/20180919/1537345388579017745.jpg
正确的设计是Board cutout和成形（实线）[backcolor=#ff0000]叠加[/backcolor]
[backcolor=#ff0000]

IMAGE: http://https://www.sz-jlc.com/uploadfiles/image/20180919/1537345771083094824.jpg[/backcolor]
[backcolor=#ff0000][/backcolor]
Keep-out层绘出开孔形状，生成的Gerber效果图[backcolor=#ff0000][/backcolor]
[backcolor=#ffff00]温馨提示：keepout勾不能勾[/backcolor]

[backcolor=#ff0000]

IMAGE: http://https://www.sz-jlc.com/uploadfiles/image/20180919/1537346212160055718.jpg[/backcolor]
[backcolor=#ff0000]
[/backcolor]