| 摘要 |
A safety heater (1) for long-lasting insecticide or deodorant mats (4) comprises means (9, 10, 11; 16, 17, 18; 19A; 21, 22, 23, 24) for signaling the life period of said mat (4), as well as safety means (3, 8) apt to prevent the replacement or accidental removal of the mat (4) while the heater (1) is working. |
