1. 1
   The design of closed-circuit breathing apparatus for mine rescue work

   由 Hartwell, F. J.
   出版 1956

   Sheffield : Ministry of Fuel and Power, Safety in Mines Research Establishment, 1956.

   41 p. : ill. ; 24 cm.

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2. 2
   The design of closed-circuit breathing apparatus for mine rescue work

   由 Hartwell, F. J.
   出版 1956

   Sheffield : Ministry of Fuel and Power, Safety in Mines Research Establishment, 1956.

   1 online resource (41 p.) : ill.

   Local Call Number: 載入...
   

   Center for Research Libraries: v.134 (Jun 1956)
   

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