Break the contact by switching off the current or meter if it can be quickly reached, if not remove the plug or wrench the cable free.
如果电源能很快的够到，则关掉电源，防止再接触，如果不能的话，就移开插头，或者扭掉电线。
2
Handan Tonghe Fastener manufacturing co. Ltd. is a company specialized in manufacturing fittings for spark plug, inner expansion bolts, drop-in anchor, socket wrench, nuts and screws.
You can refine your "calibrated elbow" by using a properly maintained torque wrench a few times a month for common jobs like tightening that drain plug.