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