General cleaning agents can remove the stone surface of the dirt, and bacteria within the pores of the stone and dirt powerless.
一般清洁剂只能除去石材表层的污垢，而对石材毛细孔内的细菌和污垢无能为力。
General cleaning agents can remove the stone surface of the dirt, and bacteria within the pores of the stone and dirt powerless.
一般清洁剂只能除去石材表层的污垢，而对石材毛细孔内的细菌和污垢无能为力。
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