write note on water level indicator also write its characteristics, advantages and disadvantages....
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water level indicator,,are one of wise inventions to check the common urban
problems of tank overflow
technology needs needs not be modified
to aolve the issue of cofortable life style,and water level indicators is one such
in the current day world , when water
storage in only 10 years more,it is a wonderful tech
simran,,kya woh sach me chala gya??
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