| 摘要 |
An installation for heating grounds, in particular sports grounds, using buried cables (9, 9', 9') supplied with electric current is disclosed. The surface of the grounds to be heated is divided into a number of sectors (1a, 1b, 1c, ..., 1n), and each sector is heated by at least two heating lines (9, 9', 9') each constituting a secondary of a common transformer (3a, 3b, 3c).
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