一尘不染;
The precision instrument must be kept free from dust.
精密仪器必须保持无尘.
Store the camera away from humidity and in a dust-free place.
要把相机置于干燥、无灰尘的地方.
We put our books in bookcase to keep them free from dust.
我们把书放进书柜目的不落上灰尘.
Inter woven from asbestos dust free warp and weft yarns.
本产品适用石棉经纬交织而成.
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