Evaporating seawater, Producing salt, Filtering water in a faucet, Making tap water clean, Separating iron filing from sugar, Sorting the magnetic from non-magnetic material, Removing oil from water, Making the water free from contamination

द्वारा

लीडरबोर्ड

दृश्य शैली

विकल्प

टेम्पलेट स्विच करें

ऑटो-सेव पुनःस्थापित करें: ?