The invention discloses a differential connecting rod and draft cable for an agricultural tillage device. The isolated ECM is configured for epicardial attachment over a myocardial region including an injured area to control post-injury remodeling of the myocardial region. The control system may be configured to individually control the first and second drive members simultaneously. The width of an opening is somewhat wider than the diameter of an individual diamond particle. The temperature detecting circuit detects temperature signals and current signals from the thermal resistor.