best project on human heart
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Make two holes in PVC pipe cape. cut the collar of balloon. fix this balloon on the drip pipe with the help of tape. balloon fixing with tape. cut the balloon from the centre. the same way we will prepare the second valves. cut one drip pipe with the distance of one inch. fix the small drip pipe in the centre hole of PVC pipe cape. fix the long drip pipe in the other hole from inside of the cape.
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make two holes in PVC pipe Cape
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