针叶漂白牛皮纸浆
nadelholz bleached kraft pulp
木聚糖酶纸浆漂白助剂
xylanase paper pulp bleaching agent
牛皮纸浆法
kraft process sulfate process
sulfate process
sulfate process kraft process
sulfate process:kraft process
kraft process
机械浆漂白
mechanical pulp bleaching
一步法制漂白浆
one process cooking-bleaching