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US7926410B2
(en)
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Hydraulic circuit for synchronized horizontal extension of cylinders
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PL124198B1
(en)
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Releasable check valve used in underground mining as either robbing or jacking valve
|
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US7237983B2
(en)
|
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Hydraulic shield support
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PL83636B1
(env)
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|
|
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CZ278203B6
(en)
|
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Pilot valve of a mechanical support hydraulic prop
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PL140385B1
(en)
|
|
Hydraulic control system for self-advancing roof supports
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CN108916148A
(zh)
|
|
一种矿用锚索张拉机液压系统
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US4046060A
(en)
|
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Hydraulic control systems for use with mining apparatus
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US4264237A
(en)
|
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Method for controlling a hydraulically operated mine roof support and an arrangement for carrying out the method
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CA2160987A1
(en)
|
|
Drilling arrangement and drilling feed mechanism
|
|
CZ65695A3
(en)
|
|
Support prop for use in mines
|
|
PL80728B1
(env)
|
|
|
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US3541926A
(en)
|
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Control system for a stepping hydraulic roof propping system
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GB2132259A
(en)
|
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Hydraulic control arrangement
|
|
PL71636B3
(env)
|
|
|
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US2793620A
(en)
|
|
Pressure interlocked-quick release valve
|
|
EP0344252B1
(en)
|
|
Device for displacing a first part relative to a second part
|
|
US3721159A
(en)
|
|
Hydraulic control devices
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PL158851B1
(en)
|
|
Two-way hydraulic motor
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PL189722B1
(pl)
|
|
Układ wychyłu ramienia górniczego kombajnu ścianowego
|
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SU375386A1
(env)
|
|
|
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PL46883B1
(env)
|
|
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PL63725B1
(env)
|
|
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PL91078B1
(env)
|
|
|
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SU1548459A1
(ru)
|
|
Шахтна гидравлическа крепь
|