论文部分内容阅读
1 取材与制作 1.取直径为80mm的圆底烧瓶一个,从颈根部截去上部管颈,取用下部分,名曰:“圆底容器”(附图)。 2.取直径为18mm试管一支,从管口下50mm处截断,取用上部
1 Drawing and production 1. Take a round bottom flask with a diameter of 80mm, cut the upper neck from the neck and take the lower part, name: “round bottom container” (drawing). 2. Take a tube with a diameter of 18mm and cut it off from the mouth of the tube at 50mm. Take the upper part.