1g是多少mg,

30kg 1g weighing electronic balance for jewelry store laboratory
393mg钠=1g盐
等级 f1等规格:50g 砝码外形常规:1mg-500mg不锈钢外形为片状常规:1g
如图是盖中盖高钙片的部分说明某课外兴趣小组欲检验说
01g 0.1g 1g 0.001g 0.1mg