技术参数：

牛奶专用奶稠计

 Hydrometer
for milk, in conformity with the former DIN 10290 standard,
without thermometer,
1.020 –1.045: 0.0005 g/ml, T = 20 °C, approx. 350 x 25 mm
6620 standard design
6621-E officially calibrated
6622-ES officially calibrated, with certificate