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A Guide to Electric Fencing Relating to Principles, Installation and Safety
R. H. Armstrong
C. H. Banks
M. P. Gill
出版
Hill Farming Research Organisation
, 1981
ISBN
0708401694
9780708401699
URL
http://books.google.com.hk/books?id=TMN8QwAACAAJ&hl=&source=gbs_api