Background Cardiac implantable electric devices are commonly used to treat heart failure. Little is known about temporal and geographic variation in use of cardiac resynchronization therapy (CRT) devices in usual care settings.
A hammer drill, also known as a rotary hammer, roto-drill or hammering drill, (see also rotary drill) is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and provide quicker drilling with less effort.
The DR Roto-Hog tiller is designed to be towed behind a garden tractor, riding lawn mower or ATV. Unlike unpowered tow-behind cultivators, the Roto-Hog doesn't depend on the towing vehicle's power to plow through the soil, and its 36-inch tilling width is about twice as wide as that of even large walk-behind tillers.