城市: city; town; abad; conurbatio ...燃气: gas相对密度: relative density测定: determine; determination; se ...方法: method; means; way; techniqu ...焦炭真相对密度测定方法: coke-determination of true relative density煤的真相对密度测定方法: determination of true relative density of coal城市燃气热值测定方法: method of testing for calorific value of gas in urban areas城市燃气中焦油和灰尘含量的测定方法: determination of coal tar and dust of gas in urban area焦炭假相对密度及总气孔率测定方法: coke-determination of apparent relative density and total porosity液体相对密度测定法: areometry油类相对密度测定计: oil gauge木材密度测定方法: method for determination of the density of wood容积密度测定方法: iron ores determination of bulk density水泥密度测定方法: standard test method for cement density褐煤蜡密度测定方法: determination of density of montan wax日用玻璃密度测定方法: the density of daily use glass-test method炭素材料真密度测定方法: carbon materialsdetermination of the true densityty粘度测定方法: testing method for viscosity of pattern materials in investment casting城市燃气: gas城市燃气中氨含量测定: determination for ammonia of gas in urban area离子交换树脂湿视密度测定方法: method for the determination of bulk density of ion exchange resins in wet state离子交换树脂湿真密度测定方法: method for the determination of true density of ion exchange resins in wet state炭素材料体积密度测定方法: carbon materialsdetermination of the bulk densityty视相对密度: apparent relative density