Test tube holders are for after you take blood and if u have a test tube that has the clot activator in it, it has to sit for 30 mins so the blood can clot, once it clots you spin it down and you get the serum that is inside
The testube holds liquids and other scientific substances. It can be held between two metal prongs known as a testube holder. Often, a testube holder raises the testube over a bunsen burner (an open flame).
it is a testube holder
... is to hold testtubes in upright position.
testtube holder-use to hold testube
to clean the testube
test tube rock
A patent gives the holder exclusive rights to that idea/product. It allows the holder to sue anyone who sells or otherwise uses the product.
Yes, they are made out of glass and so will break if thy are dropped
No, the Proxxon uses a coller system where the rotary tool slides into the holder. The Dremel uses a threaded system where the rotary tool is threaded into the holder. The Proxxon is more precise way of attaching a rotary tool.
A test tube holder is a device to ...wait for it...hold test tubes ! ;-) Usually a rack or clamp that keeps them upright (& full if in use).
A needle holder used during surgery is a type of clamp that the surgeon uses to hold the needle while closing a wound. A needle holder in a sewing machine holds the needle in place so that sewing can be accomplished.
There are varied uses for a gimbal system. They can be used for something as simple as a coffee cup holder to something as complicated as an array of satellite antennae.