本文用三颈圆底烧瓶及比色法测定钻（Ⅱ）式交换树脂在不同浓度的氯化钙溶液中的交换扩散机理。
The ion exchange between cobalt (ⅱ) - form ion exchanger and calcium chloride solution was studied by using a three-necked flask as the reaction vessel and the rate of exchange was measured by the colorimetric method .
三颈圆底烧瓶