TransliterationArmatura. Aktsionernoe obshchestvo Langenzipen i Ko. Katalog #71. Chuguno-medno-liteynyy, armaturnyy i mashinostroitelnyy zavody
In EnglishArmatures. Joint Stock Company Langensipen & Co. Catalogue # 71. Iron and copper foundries, fittings and machine-building plants In Russian
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