falling coaxial cylinder viscometer

... fall time, 下降时间 falling coaxial cylinder viscometer, 同轴圆筒下落粘度计 falling sphere viscometer, 落球粘度计 ...

... fall time, 降落时间 falling coaxial cylinder viscometer, 同轴圆筒着落粘度计 falling sphere viscometer, 落球粘度计 ...