A power tool of the type comprises a housing, a rotation motor, an output shaft carrying and rotating a working implement, and a grease lubricated angle drive coupling the output shaft to the motor, wherein the angle drive includes a gear chamber containing lubricating grease, a pinion connected to the motor, and a bevel gear secured to the output shaft. The methods include injecting a steam-gas-solvent mixture to mobilize hydrocarbons in a formation and producing from the formation the hydrocarbons that are mobilized. Compressed gas is communicated to the second cylinder and the retention force of the retention element is overcome, to release the retained component of the apparatus, thereby causing the second piston to move linearly and enabling the anvil to drive the fastener into the workpiece. to a node in the form of a controllable unit associated with a device, e. The tank flange is constructed of a non-conductive polymer. The invention maintains isolation between the high- and low-voltage sections by using a capacitor.