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单词 crab-roller
释义

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crab-roller
crab-roller n. Printing a short roller mounted at an angle on a larger one so as to travel back and forth, distributing the ink evenly.
ΚΠ
1889 Cent. Dict. Crab-roller,..a small roller which distributes printing-ink on the ink-cylinder of the Adams printing-press: so called because its motion is sidewise and apparently diagonal.
1896 Amer. Bk.-maker Aug. 37/1 The ‘crab-roller’ is yet known to some Adams pressmen. It was an ingenious little mechanism, having a sort of sideways-backward movement.
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