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  • Publication Date: December 31, 1969
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    CN-105714743-AJune 29, 2016山东中博重工机械有限公司一种履带式多功能混凝土衬砌机
    US-2004028483-A1February 12, 2004Robinson Robert A.Submersible canal bypass
    US-5160221-ANovember 03, 1992Environmental Protection, Inc.Waterway liner
    US-6543968-B2April 08, 2003Robert A. RobinsonSubmersible canal bypass
    US-6837655-B2January 04, 2005Robinson Robert ASubmersible canal bypass
    US-8096730-B1January 17, 2012Alan HollisApparatus for laying concrete metal pipes inverts and method for using the same
    WO-2010028959-A1March 18, 2010Hagn Umwelt GmbhScellement de canaux