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While using traditional pumping paper, it is always half exposed to the air and the exposed part is easily contaminated by dust and bacteria in the air,so users feel insanitary in most occasions. Small triangle box pumping paper has changed the paper's folding method, with its stacked way still being kept. In this way only a small triangle paper is exposed to the air in the whole using process, which reduces the exposed area of pumping paper maximally.
Xiaodan Yang; Xiaoqin Lu; Jinyi Chen; Xi Wang