|
US4042043A
|
|
Portable earth boring machine
|
|
US4047578A
|
|
Portable earth boring machine
|
|
US4047582A
|
|
Portable earth boring machine
|
|
CA1025841A
|
|
Portable earth boring machine
|
|
US3939926A
|
|
Portable earth boring machine
|
|
US3938597A
|
|
Portable earth boring machine
|
|
US3945443A
|
|
Steerable rock boring head for earth boring machines
|
|
US4013134A
|
|
Portable earth boring machine with steering head
|
|
CA1017321A
|
|
Power train for horizontal earth boring machine
|
|
US3907043A
|
|
Horizontal boring machine with remote pump control system
|
|
CA978514A
|
|
Power train for horizontal earth boring machine
|
|
US4042046A
|
|
Directional control mechanism for underground driven pipes and conduits
|
|
US3851716A
|
|
Horizontal earth boring machine
|
|
US3912024A
|
|
Power train for horizontal earth boring machine
|
|
US3870110A
|
|
Power train for horizontal earth boring machine
|
|
CA985267A
|
|
Power train for horizontal earth boring machine
|
|
US3679006A
|
|
Power train for horizontal earth boring machine
|
|
US3693734A
|
|
Boring auger for horizontal earth boring machine
|
|
US3612194A
|
|
Earth-boring machine
|
|
US3610345A
|
|
Earth boring machine carriage with detachable pusher ring and power frames
|
