natural l resin天然树脂
Natural Plant Resin天然植物树脂
natural plant resin bonded sand植物树脂砂
Ialian natural resin意大利天然树脂
natural resin bonding天然树脂粘合
Natural resin A天然树脂A
natural resin shellac天然树脂紫胶
modified natural resin改性天然树脂
Rosin is a kind of renewable natural resin and important chemical material. There are abundant rosin resource in Guangxi province, Guangxi province had produced 180,000 tons rosin one year .
松香是一种可再生的天然树脂和重要化工原料，广西拥有丰富的松香资源，年产量约18万吨。
参考来源 - 聚合松香浅色化技术研究