how a plastic water tank is made in the factory

how a plastic water tank is made in the factory,plastic water tank,plastic,how to make a plastic water tank,plastic water tank making,how plastic water tanks are made,disadvantages of plastic water tanks,making plastic tank,made of pp,made of pe,plastic tanki making,plastic machinery,world of tanks,plastic tanki manufacturing,how to get plastic fuel tanks to flow,concrete vs plastic water tanks,how ss tanks are made,plastic water tanks health problems