Abstract: A brush cutter may include a back plate and a spindle arrangement with the spindle arrangement abutting the back plate. The brush cutter may also include an angular arm mechanically formed integrally with or mechanically connected to the spindle arrangement where the angular arm is at angle ? relative to the back plate. Angle ? is an acute angle. The brush cutter may also include a mower deck, where the mower deck is mechanically connected to the angular arm and a blade, the blade mechanically connected to the mower deck.

Abstract: A brush cutter may include a back plate and a spindle arrangement with the spindle arrangement abutting the back plate. The brush cutter may also include an angular arm mechanically formed integrally with or mechanically connected to the spindle arrangement where the angular arm is at angle ? relative to the back plate. Angle ? is an acute angle. The brush cutter may also include a mower deck, where the mower deck is mechanically connected to the angular arm and a blade, the blade mechanically connected to the mower deck.

Abstract: A system for fracturing a subsurface formation may comprise a transport unit with hydraulic legs, an electric motor mounted on the transport unit, a fracking pump mounted on the transport unit and configured to be powered by the electric motor, and an oil tank mounted on the transport unit such that the motor and the fracking pump are above the oil tank. The oil tank may have a first tank height under the pump and a second tank height under the motor and the first tank height may be greater than the second tank height. The oil tank, motor support beam, and pump support beam may form a single structural unit. The system may also include an oil pump for pumping lubricating oil through the fracking pump, an electric motor configured to drive the oil pump, a variable frequency drive configured to control the electric motor.