引用:
作者: 有门!
我敢说你确实看了那张图片,但没有注意这个细节,因为那张图片早就在那里了。嘿嘿!
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yes, i did see the picture and could not figure out the grove on there because I supposed the holes are simply on same level.
That's why I commented LZ should have posted a HIGH DEFINITION picture so that I could see the grove.