勒德罗排铸机：标题字排铸机的专利名称。它用手工执排字模，然后铸成单个铅字。
Ludlow: Proprietary name of a display-size typesetting machine for which the matrices are assembled by hand and the type is cast in line slug.
勒德罗排铸机：标题字排铸机的专利名称。它用手工执排字模，然后铸成单个铅字。
Ludlow: Proprietary name of a display-size typesetting machine for which the matrices are assembled by hand and the type is cast in line slug.
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