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This system and Exchange grid has nature of different, it used has high pressure pulse (5000-8000V) and the low energy (is less than 5 a joules) pulse voltage or low voltage pulse (700v around), each seconds issued a pulse signal, thus on people not constitute life against, while electronic fence of flexible zone support rod and dedicated alloy silk, not support human of weight, and can perception invasion who of invasion, and issued alarm signal, ensure system of security reliable.