noun or participle which takes 'suru'
mask clearing; blowing air into a dive mask
Diving term: blowing air through the nose into the mask to clear water or equalize pressure. Wasei-eigo from 'mask blow'.
wasei-eigo (Japanese-coined English), from mask blow
See also: マスククリア
ダイビング中にマスクブローを忘れないでください。
Don't forget to clear your mask while diving.
マスク
If you can't clear your mask properly, water gets in and it's uncomfortable.