partners planning over laptop while standing against equipment by car at field - 石油工人 個照片及圖片檔天然氣, 原油, 汽油
female worker using tablet pc while standing by car at oil field against sky - 石油工人 個照片及圖片檔原油, 天然氣, 汽油
engineer looking at machinery while using tablet pc at oil industry against sky - 石油工人 個照片及圖片檔原油, 汽油, 天然氣
stationary or technical engineer at work, checking valve pipes, calculating and analyzing charge of oil and gas in digital tablet - 石油工人 個照片及圖片檔天然氣, 石油工業, 氣體
engineers looking at machinery while planning over laptop by car at oil field - 石油工人 個照片及圖片檔原油, 汽油, 天然氣
serious engineer using laptop while working at oil field against sky during dusk - 石油工人 個照片及圖片檔技術, 能源, 工程師
engineers monitoring environmental conditions near industrial oil refinery - 石油工人 個照片及圖片檔工廠, 職業, 手提電腦
professional male inspector in helmet measuring and analyzing data on mobile device on oil and gas field near oil jack pump - 石油工人 個照片及圖片檔油田, 氣體, 男人
engineer checks shipment of chemicals at oil and gas industry pipeline job site - 石油工人 個照片及圖片檔油田, 化工廠, 化學品