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US2848196A
(en)
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Portable drilling rig
|
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(en)
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Means for steering a tractor by varying the point of load application to a transverse tow bar supported by the tractor
|
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US1997001A
(en)
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Bulldozer
|
|
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(en)
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Bi-directional surface leveling system
|
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(en)
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Trenching tool for installing perforated pipe
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(en)
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Directional boring device
|
|
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(en)
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Cable and pipe laying machine
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SU238488A1
(enrdf_load_html_response)
|
|
|
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(en)
|
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Releasably retained hinged plow
|
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(en)
|
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Elevatable operator's compartment having a drill steel guide for a mine drilling machine
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(en)
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Adjustable mechanism for endless conveyor type ditching machine
|
|
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(en)
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Cable-laying attachment for road grader vehicle
|
|
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(en)
|
|
Pipe line uncovering means
|
|
PT1444405E
(pt)
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|
Aparelho e método para abrir valas
|
|
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(en)
|
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Canopy assembly for a dual boom drill
|
|
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(en)
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Earth digging machine for use on soft or undulating terrain, particularly for the clearing of ponds, swamps or canals
|
|
US2686981A
(en)
|
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Crumber adjustment for endlesstype trench digging machines
|
|
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(en)
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Protective canopy and temporary roof support for mining machinery
|
|
CS273165B2
(en)
|
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Drilling car especially for footwall perforation
|
|
US6668728B2
(en)
|
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Machine for rehabilitating a track bed
|
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CN211737045U
(zh)
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一种履带式移动台车
|
|
US1900226A
(en)
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Well reamer
|
|
US4391334A
(en)
|
|
Hitch assembly
|
|
NL1020870C2
(nl)
|
|
Boorvoertuig, veiligheidssysteem en boorinrichting.
|
|
CN117738608B
(zh)
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一种油砂钻探取芯装置
|