五系列玻璃比重计的要求涉及调整和读数的参考水平、材料、尺寸、形状、刻度和操作。附件涉及标准表面张力、阀杆直径和弯月面修正。

The requirements for five series of glass hydrometers concern reference levels for adjustment and reading, materials, dimensions, form, scale and handling. The annexes deal with standard surface tensions, stem diameters and meniscus corrections.