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Safety helmet, especially for police use, has internal cavity behind its front surface into which visor fits when raised

机译：安全帽，特别是供警察使用的头盔，在其前表面的后面有内部空腔，抬起挡板时可将其装入内部

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摘要

The safety helmet has an internal cavity (10) behind its front surface (5). A visor (9) fits into this when raised.

机译：安全帽在其前表面（5）的后面有一个内部空腔（10）。升起时，遮阳板（9）装在其中。