Kémikus, a légzőkészülék és kék kesztyű a kémcsőben a kezébe veszi a mintát víz közelében tó partján - Stock fotó és kép

Laboratory assistant in respirator and blue gloves with test tube in hands takes sample of water near lake shore

Chemist on river bank with test tube and water in hands

Laboratory assistant with test tube, thumb up, blurred background

Ecologist with test-tube and mask, protective suit, finger down, sits on river bank

Photography of environmentalist for examination takes water in reservoir

Chemist looks at flask with water sitting on river bank

Chemist with bulb and raised finger sits on river bank

Biologist with test tube in mask, protective suit, finger down, sits on river bank

Ecologist in blue gloves with test tube in hands takes sample of water near lake shore

Photo ecologist from back and in protective suit with flask with water in hands on river bank

Photo of biologist in mask, protective suit with test tube, finger down, on river bank

Photo of chemist in protective suit on river bank,

Medical worker in protective suit, glasses, gloves with liquid soap in hands isolated on gray background in studio. Coronavirus epidemic

Human in protective suit, glasses, gloves with liquid soap in hands isolated on gray background in studio. Coronavirus epidemic

Young biologist in protective suit takes water samples in river

Doctor in protective suit, glasses, gloves with liquid soap in hands isolated on gray background in studio

Young environmentalist in protective suit takes water samples in river