Then, the leaves are carefully ground with stone grinding wheels to produce a fine powder. (wellnessmama.com)
The reads: «This is a president who virtually sneaked out of Nigeria, who breached his own self declaration of transparency, by keeping Nigerians in the dark for over 100 days, and in that process grinding the wheel of progress of the nation. (nigeriapoliticsonline.com)
This package also includes three grinding wheels for sharpening of many different types of blades. (geekwrapped.com)