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arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… … Universalium
Glass-ceramic-to-metal seals — Glass to metal seals have been around for many years, with one of the most common uses being lamp bulb seals. A more recent invention is glass ceramic to metal seals.Properties Glass ceramics are polycrystalline ceramic materials prepared by the… … Wikipedia
Bentonite — is an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite. There are a few types of bentonites and their names depend on the dominant elements, such as K, Na, Ca, and Al. As noted in several places in the … Wikipedia

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