短語詞組短語oil charging piping 注油管系oil -piping layout 油導(dǎo)管oil well piping 油井管oil fuel piping 燃油管系oil lubricating piping 潤滑油管路lube oil supply piping 潤滑油供油管道fuel oil injection piping 高壓供油管路main oil gas piping 大油氣管線 返回 oil piping