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(feather) duster
dusting
「叩き」 has another reading with different meanings.
棚のほこりを叩きで払います。
I dust the dust off the shelves with a duster.
祖母の叩きはとても古いです。
My grandmother's duster is very old.
毎日叩きでリビングの家具をきれいにします。
I clean the living room furniture with a duster every day.