tube grinding-and-polishing machine
21List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
22glassware — /glas wair , glahs /, n. articles of glass, esp. drinking glasses. [1705 15; GLASS + WARE1] * * * Introduction any decorative article made of glass, often designed for everyday use. From very early times glass has been used for various… …
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