core hole at r . c . beam for installation of pipes 直梁上鉆孔以便管道安裝
seal with end cap after finishing installation of pipes 布放完成之導管需填以管塞避免異物進入。
non-arcing installation of piping system in downcast shaft of coal mines 煤礦風井井筒中管路裝備不動火安裝
petroleum and natural gas industries-design and installation of piping systems on offshore production platforms 石油和天然氣工業(yè).近海生產(chǎn)平臺管道系統(tǒng)設(shè)計和安裝
petroleum and natural gas industries-design and installation of piping systems on offshore production platforms 石油和天然氣工業(yè).海上作業(yè)平臺管道系統(tǒng)的設(shè)計和安裝