ぼうじん

傍人
bystander
防塵
protection against dust

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I

ぼうじん【防塵】

●防塵の dustproof; dust-tight.

防塵装置 a dustproof device [system].

防塵膜 a dustproof membrane.

防塵マスク a dust mask; a clean mask.

防塵眼鏡 (a pair of) goggles to keep dust out of the eyes.

II

ぼうじん【傍人】

a (neutral) bystander; a person (who happens to be) nearby.