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forced auxiliary ventilation

A system in which the duct delivers the intake air to the face. The forcing system may be used with flexible ducting and simplifies arrangements for protecting the duct from blasting. The forcing system has the added advantage that the fan motor always works in intake air, and no special arrangements about fan drives are necessary.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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