Patented H. E. P. A. filtered vacuum for the recovery of lead, dust, paint chips, and other hazardous materials.

拥有专利技术，用于回收铅、尘土、油漆片和其他危险材料。

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It said that, although Nasa was taking steps to protect the shuttle from orbital debris such as spent rocket bodies, satellite fragments and paint chips - there was a real risk that a collision could cripple the shuttle or threaten the safety of the crew.

BBC: Was Columbia struck by space debris?