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rmal style="MARGIN: 0cm 0cm 0pt; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2">rning: 18.0pt; mso-bidi-font-family: 宋体">Preliminary Comparison Research for Origin Characteristics of Qingtian Stone, Shoushan Stone, Changhua Chicken-Blood Stone and Balin Stonerefix = o ns = "urn:schemas-microsoft-com:office:office" />