ขนาดวิดีโอ: 1280 X 720853 X 480640 X 360
แสดงแผงควบคุมโปรแกรมเล่น
เล่นอัตโนมัติ
เล่นใหม่
Thankd
Hello, if I have a rectangular laboratory sedimentation tank and I want to take samples from inside the basin, how much do I go down from the surface of the water to take a sample and why? I have been told to follow something but I don't know why?
Thankd
Hello, if I have a rectangular laboratory sedimentation tank and I want to take samples from inside the basin, how much do I go down from the surface of the water to take a sample and why? I have been told to follow something but I don't know why?