Main products: Glovebox, Solvent Purification System and Gas Purification System.
主要产品包括：手套箱，有机溶剂净化系统和气体净化系统。
The practice showed chemical regent did not need to regenerate even long time use. Its using lifetime was longer than ionic exchange resin's. It was ideal solvent purification measure.
实践表明：凝胶色谱即使长期使用也无需用化学试剂再生，使用寿命比离子交换树脂更长，是一种比较理想的溶剂净化手段。
Purification of 2,6 dichlorotoluene by the recrystallization method without solvent was studied.
研究了用无溶剂重结晶法提纯2 ，6 二氯甲苯。
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