ISO 649-1 : 1981(R2010)现行
LABORATORY GLASSWARE - DENSITY HYDROMETERS FOR GENERAL PURPOSES - PART 1: SPECIFICATION
出版：International Organization for Standardization
专家解读视频
This part of ISO 649 specifies requirements for five basic series of glass hydrometers of constant mass which are graduated to indicate density (kg/m3 or g/ml) at 20 °C.
NFB 35 511 : 83 FD - Identical
NEN ISO 649-1 : 1982 - Identical
UNI ISO 649-1 : 1983 - Identical
NEN ISO 649-1 : 1982 - Identical
NFB 35 511 : 83 FD - Identical
UNE 400311-1 : 1998 - Similar to
UNI ISO 649-1 : 1983 - Identical
