首页产品介绍零配件及附件Kjeldahl Tablets ECO, 1000 pcs.Environmentally friendly with less chemicalsThe Kjeldahl Tablets ECO are environmentally friendly and contain less chemicals. The box consists of 1000 tablets and the composition is 3.998 g K2SO4 / 0.002 g CuSO4 ∙ 5 H2O. 服务更多 服务了解我们的服务安装维护和检修认证和校准培训