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单词 pyrostereotypy
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pyrostereotypy
pyrostereotypy n. Obsolete rare a process in which an intaglio is burned into a wooden block with a heated metal blade, and a printing plate cast from this, used mainly for printing music and maps.
ΚΠ
1869 F. A. P. Barnard Machinery & Processes Industr. Arts in Rep. U.S. Commissioners Paris Univ. Exposition 1867 III. 456 Others [sc. plates for printing a geological map of France] are produced by a process called ‘pyrostereotypy’, which consist in preparing a matrix by a peculiar proces of burning it into wood, and then taking a cast of it in an easily fusible metal.
a1877 E. H. Knight Pract. Dict. Mech. II. 1839/1 Pyrostereotype, a process in which a block of wood is prepared as a matrix for a fusible metal by burning away portions of its surface. The burning tool is a delicate blade heated by a jet of flame.]
extracted from pyro-comb. form
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