Feb 26 2018018332Before you can even begin to ascertain a value for your familys heirloom crystal you first have to establish whether it is really crystal who made it and how old and rare it is Although the process of making glass has been around since about 3500 BC it wasnt until 1674 that Englishman George Ravenscroft patented the process of adding lead oxides to glass to make crystal.
Vibrating feeder is also called vibratory feeder or ore vibrating feeder.Detail
Jaw crusher is the vital equipment in crushing industry.Detail
Sand washer is also called sand washing machine.Detail
Pendulum feeder is also called pendulous feeder or pendulum feeding machine.Detail
Charcoal briquette machine is also known as charcoal briquetting machine, charcoal ball press machine, or charcoal pressure ball machine.Detail
The high pressure briquetting machine or the high pressure ball press machine is used to press many kinds of materials such as gypsum, coal powder, mineral powder, scale cinder, slag, fine iron powder and aluminum ash etc.Detail