Production practice on casting the round tube blank of steel 20 with round tube blank continuous caster testing method for bulk specific gravity of light weight castable refractories ( method for molded goods) 圆坯连铸机浇铸20钢铸坯的生产实践轻量型可浇灌耐火材料毛体积比重试验方法(铸型制品试验法)
Testing method for bulk specific gravity of light weight castable refractories ( method for molded goods) 轻量型可浇灌耐火材料毛体积比重试验方法(铸型制品试验法)
A Study on Corn Root Growth and Activities at Different Soil Layers with Special Bulk Density Initial Specific Weight of Deposits 下层土壤容重对玉米根系生长及吸收活力的影响淤积物的初期干容重