首页>
外国专利>
NEAR-VERTICAL LAYING OF OFFSHORE PIPELINE: PIPE JOINTS LOWERED FROM UPPER ALIGNMENT TOWER DOWN THROUGH LOWER TOWER HAVING LOAD BEARING TRAVEL BLOCK
NEAR-VERTICAL LAYING OF OFFSHORE PIPELINE: PIPE JOINTS LOWERED FROM UPPER ALIGNMENT TOWER DOWN THROUGH LOWER TOWER HAVING LOAD BEARING TRAVEL BLOCK