Results (
English) 2:
[Copy]Copied!
1. Metal is not Smith or does not corrode like steel rods, copper or plated or clad with copper. With a diameter of not less than 5/8 inch in length and 2.40 meters.
2. If a copper-plated steel or copper to a thickness of not less than 0.25 mm., and must cover the meat, set the seal as well. Without peeling or falling out of steel and non-steel body appeared.
3. Do not use materials made of aluminum or aluminum alloy is mainly due to soil erosion is easier.
4. Allow the building is a metal. and is grounded properly. The impedance of the grounding less than 5 ohms.
Being translated, please wait..