1. 1
   The relative ignition risk of coal dust clouds by permitted explosives

   由 Grimshaw, H. C.
   出版 1956

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

   1 online resource (16 p.)

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   Center for Research Libraries: v.132 (Jun 1956)
   

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2. 2
   The relative ignition risk of coal dust clouds by permitted explosives

   由 Grimshaw, H. C.
   出版 1956

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

   16 p. ; 24 cm.

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