The safety switch comprises a heat transfer piece, an insulating seat, a fusible body, a control rod and a movable safety piece.

该保险开关，它包括一热传递片、一绝缘座、一可熔体、一控制杆以及一动保险片。

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The movable safety piece is connected with the insulating system, is supported against by the control rod, and is in normally closed connection with the fixed contact piece.

该动保险片，它连接绝缘系统，而且，它受控制杆顶抵并常闭连 接该定接触片。

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Shuttle programme manager Ron Dittemore has confirmed that Nasa engineers are still focusing on a piece of insulating foam as the leading suspect in causing the problem which destroyed the Columbia.

BBC: Body of Israeli astronaut identified