Hand in glove collects water in a test tube. Concept – water purity analysis, ecology. Water testing for infections Tamanhos: 150 × 150 / 300 × 200 / 768 × 512 / 1.024 × 683 / 1.536 × 1.024 / 2.048 × 1.366 / 380 × 249 / 650 × 427 / 825 × 542 / 935 × 614 / 304 × 170 / 370 × 247 / 1.024 × 683