The picture illustrates the construction of a simple 
water
 filter and how it functions to produce clean and suitable drinking Use synonyms
water
          Use synonyms
Overall
, the system includes some natural materials and basic equipment that can be used to produce drinkable Linking Words
water
 after Use synonyms
few
 steps.
          Correct article usage
a few
Firstly
, there are two tanks, the Linking Words
tank
 in Use synonyms
higher
 position is used to purify the impure Add an article
a higher
water
 and the other one is used to Use synonyms
storage
 clean drinking Replace the word
store
water
. There are three natural materials inside the first Use synonyms
tank
: sand, charcoal and gravel, the main mission of those things is Use synonyms
removing
 bacteria and dirt Change the verb form
to remove
out of
 the impure Change preposition
from
water
. Two tanks are connected together by a pipe that runs from the bottom of Use synonyms
first
 Change the article
the first
tank
 into the side of the second Use synonyms
tank
. Use synonyms
Lastly
, a tap is equipped at the bottom of the storage Linking Words
tank
 to release the drinkable Use synonyms
water
.
         The process starts by lifting the lid of the first Use synonyms
tank
 and pouring the impure Use synonyms
water
 into the Use synonyms
tank
. The Use synonyms
water
 passes through the sand layer at the beginning to remove residue, after that, the Use synonyms
water
 Use synonyms
then
 goes to the charcoal layer, the charcoal can take some small dirt that people can not see out of the Linking Words
water
. Use synonyms
Moreover
, the Linking Words
water
 has to pass through the gravel layer at the final to become clean, fresh and suitable for drinking. Use synonyms
Finally
, the Linking Words
water
 after being purified goes to the storage Use synonyms
tank
 through the pipe and it can be released by the tap to use.Use synonyms