Every gum rosin factory is local economic pillar.
各松香厂都是当地嘀经济支柱。
This product is made of gum rosin through a new technology.
本产品聚合松香由脂松香采用新工艺加工而成。
Gum rosin is a kind of natural resin with high economic value.
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.
松香是一种具有重大经济价值的天然树脂。
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