Petroleum and natural gas industries - lubrication , shaft sealing and control oil systems and auxiliaries - special purpose oil systems 石油和天然氣工業(yè).潤(rùn)滑油封控油系統(tǒng)和輔助裝置.專用油系統(tǒng)
Petroleum , petrochemical and natural gas industries - lubrication , shaft sealing and control oil systems and auxilliaries - general - purpose oil systems 石油石化和天然氣工業(yè).潤(rùn)滑油封控油系統(tǒng)和輔助裝置.通用油系統(tǒng)