我们想跟孩子们一起制作硫酸铜晶体。
We tried to grow some copper sulphate crystals with our children .
采用此工艺,可得到符合GB437-93的优质硫酸铜晶体。
Copper sulfate which meets requirements of the national standard ( GB437 & 93 ) of superior grade product can be required by the technique .