Kazan, Tatarstan/Rosja - 22 sierpnia 2017: Mężczyzna w szarym płaszczu Tatneft wylewa ropy naftowej do małej żarówki i patrzy na czarną ciecz z szczęśliwy uśmiech 22 sierpnia w Kazań - Materiał filmowy & wideo

KAZAN, TATARSTAN/RUSSIA - AUGUST 22 2017: Closeup happy man lab assistant in protective glasses looks at bulb with black raw oil in modern test laboratory on August 22 in Kazan

Doctor put gel on ulstrasound equipment. Mature patient at blurred background. Procedure of ultrasonography scanning.

Laboratory technician holding blood bag in blood bank 4k

Master dentist in special rubber gloves holds syringe with colourless gel for deep cleaning teeth. Close-up

KAZAN, TATARSTAN/RUSSIA - AUGUST 22 2017: Closeup happy man lab assistant in protective glasses looks at bulb with black raw oil in modern test laboratory on August 22 in Kazan

KAZAN, TATARSTAN/RUSSIA - AUGUST 22 2017: Closeup woman scientist face in glasses and on foreground hands hold bulbs with clear slime on August 22 in Kazan

Side view lab assistant in white coat and gloves shakes bulb and liquid changes color from pink to clear

Worker in blue gloves takes thin solar panel part to apply covering at modern production plant closeup

Backside view worker in mask and white protective suit paints lorry body with sprayer in special room

Closeup scientist hand in blue rubber glove pours raw oil into dimensional high beaker with little water at workplace