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单词 point-iron
释义

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point-iron
point-iron n. Obsolete a conical iron bob on a plumb line, tapering to a point at the bottom; cf. point-brass n.
ΚΠ
1831 T. O'Scanlan Diccionario Marítimo Español (at cited word) Iron (Point) or brass, péndulo, aplomo.]
1850 J. Greenwood Sailor's Sea-bk. 138 Point-iron or brass, a larger sort of plumb, formed conically and terminating in a point, for the more nicely adjusting anything perpendicularly to a given line.
extracted from pointn.1
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