| http://www.w3.org/ns/prov#value | - Referring to FIGS. 1a, 1b and 1c, 1d which show a vibrator unit, in the driver coil assembly (16) the driving coil (1) of insulated electrical wire having multiple windings is wound around a rigid hollow cylindrical tube (2) the inside surface of which is smooth self-lubricating such as a plastic or other material having low friction qualities.
|
