对天然松香进行强化和酯化改性，确定了再生纸浆用的松香的最佳加成量和酯化度。
This paper studies the natural rosin modification on fortified and esterified. The best fortification and degree of esterification of rosin on second fiber were discussed.
就石蜡-天然松香包膜尿素而言，包膜层中石蜡和天然松香的配比是影响石蜡-天然松香包膜尿素养分释放速率的重要因素。
For the paraffin wax -natural rosin coated urea, the ratio of paraffin wax to natural rosin is of major importance to the release rate.
松香是一种具有重大经济价值的天然树脂。
Gum rosin is a kind of natural resin with high economic value.
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