flame-fusion process
21Chromium trioxide — Chromium trioxide …
22ruby — rubylike, adj. /rooh bee/, n., pl. rubies, adj. n. 1. a red variety of corundum, used as a gem. 2. something made of this stone or one of its imitations, as a bearing in a watch. 3. a deep red port wine. 4. deep red; carmine. 5. Brit. Print. a… …
23Ruby — /rooh bee/, n. a female given name. * * * Gemstone composed of transparent red corundum. Its colour varies from deep to pale red, in some cases with a tinge of purple, depending on chromium and iron content; the most valued is a pigeon blood red …
24literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
25Welding — is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld puddle ) that cools to… …
26Nuclear reprocessing — technology was developed to chemically separate and recover fissionable plutonium from irradiated nuclear fuel.[1] Reprocessing serves multiple purposes, whose relative importance has changed over time. Originally reprocessing was used solely to… …
27Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …
28metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …
29Carbon nanotube — Not to be confused with Carbon fiber. Part of a series of articles on Nanomaterials Fullerenes …
30List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
