.mrb
文件类型：Multiple Resolution Bitmap
扩展名为.mrb的文件是一个图像文件。文件说明：
Bitmap image file containing several resolutions of an image; different resolutions of the image are used depending on the resolution of the display; used by Microsoft C/C++ software.mrb打开.mrb文件
Mac OS
Windows
Microsoft Visual C++Linux
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来源：. mrb文件