发明授权
US4536937A Process of manufacturing auto bumpers 失效
制造汽车保险杠的过程

Process of manufacturing auto bumpers
摘要:
The invention represents an auto bumper with an exterior part which can be seen from the outside. The exterior part is made of stainless steel plate and an interior part is made of fiber reinforced plastics via a layer of aluminum or aluminum alloy.
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