If a white circle seems in the middle from the tissue accompanied by a robust odor of your clearing agent, it implies inadequate paraffin infiltration. Move the sample to refreshing melted paraffin and lengthen the infiltration time. -Easy operation: Vertical Ring Die Pellet Building Machine has very simple composition, easy https://paraffin-block-wax-formin91346.blogofoto.com/66420340/the-best-side-of-dongguang-tiancheng-machinery-factory