ぼうねつ

I

ぼうねつ【防熱】

protection against heat. [⇒たいねつ²]

防熱フィルター a heat filter.

防熱服 heatproof clothes [clothing].

II

ぼうねつ【傍熱】

indirect heat.

傍熱陰極 an indirectly-heated cathode.

傍熱形真空管 a heater-type vacuum tube.