Pairs of these watch glasses can be connected to each other to simulate different types of lens.
Which countries supply the most exports of watch glasses, glass for spectacles not optically worked, and hollow glass spheres and segments for sphere manufacture?
Consequently, the aesthetic appearance of these types of watch glasses or back covers are relatively quickly altered by scratches.
A device comprising an annular seal having an annular projection engaged into a groove in the edge of the watch glass is disclosed.
1.1A concave glass disc used in a laboratory to hold material for use in experiments.
（实验室中装实验物品的）表面皿
Example sentencesExamples
Pairs were placed in a watch glass and observed under a stereomicroscope.
Place sample on flat watch glass inside the glass ring form such that the sample is centered in the ring form.
In vitro fertilizations were performed by collecting oocytes from mature females in watch glasses and adding a diluted suspension of sperm obtained from 1 to 2 mature male ejaculates in sterile filtered seawater.