cofferdam造句
Thecofferdamissafeandstable.Blastingconstructionofcofferdamremovalinyumenkoupumpstationno.Twoconstructionmethodsincludingfirstsinkingsteelcofferdamthenformingpileandfirstformingpilethensinkingsteelcof...
Thecofferdamissafeandstable.Blastingconstructionofcofferdamremovalinyumenkoupumpstationno.Twoconstructionmethodsincludingfirstsinkingsteelcofferdamthenformingpileandfirstformingpilethensinkingsteelcof...