effusion method of specific gravity 孔射法测定气体比重
The method to determine the real specific gravity of atmospheric dust by using laser slitdiffraction technology has high precision and is easy to handle.
利用激光单缝衍射技术测量大气飘尘的真比重，具有精度高和测试方法简便易行的特点。
METHODS: The minimum loading capacities of ulcer paste, crystal ointment and zinc oxide liniment were examined by specific gravity method, capacity substitution method and capacity addition method.
方法采用比重法、容量替代法、容量加和法，分别对溃疡糊、水晶膏、氧化锌搽剂进行最低装量检查。
When the bulk specific gravity of coarse aggregate and the apparent specific gravity of fine aggregate are used to compute VMA value, the VMA value is greater than the VMA value by American method.
我国的粗集料用毛体积相对密度和细集料用表观相对密度计算VMA的方法和美国的方法所用公式形式一样，但用我国方法计算的VMA比用美国方法计算的VMA均偏大。
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