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William M. Black (dredge) : ウィキペディア英語版 | William M. Black (dredge)
''William M. Black'' is a steam-propelled, sidewheel dustpan dredge. She was declared a National Historic Landmark in 1992.〔〔
〕 She is open for tours as part of the National Mississippi River Museum & Aquarium. According to information provided on the tour, ''William M. Black'', one of the last paddle steamers built in the US, was used primarily along the Missouri River. She had a crew of 49 and dredged of material per day. She was placed out of service in 1973 because she consumed of heavy oil each day, which became prohibitively expensive during the 1973 OPEC oil embargo.〔(【引用サイトリンク】title=William M. Black )〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「William M. Black (dredge)」の詳細全文を読む
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