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Use of the filter apparatus. (A) Components consist of the main apparatus, a filter and a cylinder; (B) the filter is installed; (C) the cylinder is installed above the filter; (D) apparatus ready to use; (E) cylinder is filled with Ringer solution and specimen is rinsed in the solution; (F) negative pressure is applied to the cylinder; (G) the filter is grossly examined and (H) filter is put in ethanol fixative.
