… electrically heated, incorporating a motor-driven fan or blower, and parts thereof, of iron or steel. …
Explanatory notes
… electrically heated, incorporating a motor‑driven fan or blower, and parts thereof, of iron or steel. ‑ … along its outer surface, and a motor‑driven fan or blower. Generally these heaters are furnished with an … by the fact that they incorporate a blowing device (fan or blower) which serves to distribute or direct the supply of …