| 摘要 |
The infra-red heating unit(1) is covered by one or more radiation-transparent plates(6,7), at least one of which forms a pressure tight seal with the equipment to prevent explosion risk. An Independent claim is made for a process for thermal treatment of substrates in which the a substrate passes the heater and heat is provided both directly through radiation from the emittors(2) and also indirectly through reflection of the radiation at reflectors(3).
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