StablCal calibration; 20 NTU standard for Pocket Turbidimeter
https://www.cloudsystems.sa/shop/stablcal-calibration-20-ntu-standard-for-pocket-turbidimeter-336354
https://www.cloudsystems.sa/web/image/product.template/336354/image_1920?unique=5d77e87
محلول عيارى لجهاز العكارة 20 وحدة
