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coal mining emergency device in tonga

One system is known as the PED System where PED is an acronym for personal emergency device Initially developed after a mining disaster in Australia at Moura No 4 Coal Mine in 1986 5 and further developed after the Moura No 2 Coal Mine explosion in 1994 6 where the need for a communication system to survive major incidents underground was identified in the inquiries into the disasters... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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