例句與造句

1. A number of manufacturers sell non-commercial faceting machines.
2. The mast assembly is the heart of the faceting machine.
3. The essentials of how a faceting machine works will be explored through this type of machine.
4. The faceting machine is used to hold the stone onto a flat lap for cutting and polishing the flat facets.
5. :It seems like you could learn much by reading that faceting machine article and other articles on the device you want.
6. It's difficult to find faceting machine in a sentence. 用faceting machine造句挺難的
7. There are two major components of a faceting machine : The mast / head assembly, and the grinding wheel, or lap.
8. A rough gemstone piece is placed onto a faceting machine, where over fifty facets are cut and polished to create a finished gemstone.
9. "' Angle Adjustment / Goniometer "': Faceting machines differ greatly in the mechanism for setting the angle of the facet.
10. A "'faceting machine "'is broadly defined as any device that allows the user to place and polish facets onto a mineral specimen.
11. An older and more primitive style of faceting machine called a jamb peg machine used wooden dop sticks of precise length and a " mast " system consisting of a plate with holes carefully placed in it.
12. The two main classifications are stones cut as smooth, dome shaped stones called cabochons, and stones which are cut with a faceting machine by polishing small flat windows called facets at regular intervals at exact angles.
13. The vast majority of jewelry-store gemstones are faceted either abroad in factories or entirely by machines . ( Diamonds are the exception, owing to the training and specialized equipment required to facet them . ) Custom jewelry is still commonly made of custom metalwork and mass-produced gemstones, but unusual cuts or particularly valuable gemstone material will likely be faceted on a personal faceting machine.