U.S.P.O. (i.e., U.S. Post Office) differential pressure valve LCCN2002718270.jpg
Miscellaneous Items in High Demand, PPOC, Library of Congress
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U.S.P.O. (i.e., U.S. Post Office) differential pressure valve LCCN2002718270, ''Title:'' U.S.P.O. [i.e., U.S. Post Office] differential pressure valve
''Abstract/medium:'' 1 photographic print.
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en
U.S.P.O. (i.e., U.S. Post Office) differential pressure valve LCCN2002718270, Miscellaneous Items in High Demand, PPOC, Library of Congress, Images from the Library of Congress
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ja
米国郵政省 差圧バルブ LCCN2002718270、「Title:」 米国郵政省 差圧バルブ「Abstract/medium:」 1枚の写真プリント。
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米国郵政省) 差圧バルブ LCCN2002718270、PPOC、高需要雑記、米国議会図書館、米国議会図書館の画像
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differential differentially