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板栗是著名的果实，但储藏中易发生黑斑病，造成高达 ７０％ 的损失。经过三年时间的试验，发明了 Ａ Ｓ－ ３ 型保鲜剂，使黑斑病发生率降低到 ７％ 左右。
Chestnut is a famous fruit, but is prone to black spot in storage, causing up to 70% loss. After three years of testing, invented the A S-3 preservative, so that the incidence of melasma reduced to about 7%.