| 摘要 |
<p>1,145,546. Earth-graders. DEERE & CO. 20 June, 1967 [21 June, 1966], No. 28438/67. Heading E1F. In an earth grader the grader blade 19 is suspended from a beam 25 mounted on and lockable by hydraulic means 65 to a guide track 50 when in a desired relationship thereto. The guide track is so secured to the main frame 13 of the grader that the beam will lie transversely of the direction of travel of the frame when the grader is in use.</p> |
