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While hammering, power which translate from stress has been preserved to supply the electric for the flashlight. Facing with a power failure caused by some disasters, Life-saving hammer will be helpful to the trapped for power supplying and lighting. And it will find its place in many outdoor pursuits.
Sanming University
Sanming, China
yile Zheng,
Sanming University
Bingxiang Liu,
Sanming University
Hanliang Hong,
Sanming University
