Woodblock printing<span> can be </span>done<span> with wood, linoleum or rubber. W</span>oodblock printing is a technique for printing text, pictures, and patterns. This is used throughout East Asia, but originated in China. This was originated no later than the 12th century.
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Audio crossovers are a type of electronic filter circuitry used in a range of audio applications. They split up an audio signal into two or more frequency ranges, so that the signals can be sent to loudspeaker drivers that are designed to operate within different frequency ranges.
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