external exposure (to radiation)
outside
ガイ / そと
section, bureau, dept, class, copy, part, portion, counter for copies of a newspaper or magazine
ブ / -べ
incur, cover, veil, brood over, shelter, wear, put on, be exposed (film), receiving
ヒ / こうむ.る
bleach, refine, expose, air
バク / さら.す