它是将黑荆树栲胶溶于水中配成浓度为40 ~ 50%的溶液加入适量特制的低分子量活性PUF树脂和面粉，搅匀调制成单宁胶。

Acacia extract is dissolved in water to prepare a solution with 40-50% concentration, which is uniformly mixed with said PUF resin and wheat flour to obtain a tannic adhesive.

youdao

它是将黑荆树栲胶溶于水中配成浓度为40 ~ 50%的溶液加入适量特制的低分子量活性PUF树脂和面粉，搅匀调制成单宁胶。

Acacia extract is dissolved in water to prepare a solution with 40-50% concentration, which is uniformly mixed with said PUF resin and wheat flour to obtain a tannic adhesive.

youdao