F - Mech Eng,Light,Heat,Weapons – 17 – D
Patent
F - Mech Eng,Light,Heat,Weapons
17
D
137/75
F17D 1/14 (2006.01) E21F 3/00 (2006.01) E21F 16/00 (2006.01)
Patent
CA 2038280
A fluid pressure feeding apparatus is dis- closed which feeds cold water for cooling a mining pit into the pit and pumps up water and muddy water heated within the mining pit onto the ground. A controller for switching a number of the operative chambers is provided to thereby perform a continuous operation.
Kamino Yukishige
Saito Makoto
Uchida Kenji
Hitachi Ltd.
Kirby Eades Gale Baker
LandOfFree
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