Upload date
All time
Last hour
Today
This week
This month
This year
Type
All
Video
Channel
Playlist
Movie
Duration
Short (< 4 minutes)
Medium (4-20 minutes)
Long (> 20 minutes)
Sort by
Relevance
Rating
View count
Features
HD
Subtitles/CC
Creative Commons
3D
Live
4K
360°
VR180
HDR
3,865 results
591 subscribers
This Sper Scientific Clinical Refractometer measures urine specific gravity, or gives the refractive index in seconds. Comes with a ...
7,725 views
16 years ago
