A messaging method in a system including a wireless network, a routing server, and a plurality of mobile stations. The support structure includes straight segments that may be cut to any desired length. The rotational drive force of the second shaft in the forward direction is transmitted to the planetary gear mechanism via a first one-way clutch unit and a first power transmitting mechanism. A dentifrice having a haze value of less than about 70 may be prepared using this abrasive, amorphous silica.