| 摘要 |
A new and improved walking dragline excavator frame has an annular rail pad and a rail girder web for structurally backing up the rail pad, with a generally annularly arranged oblique reinforcing plate structure attached to and between the rail pad and the rail girder web for controlled transfer and distribution to the rail girder web of cyclically varying roller loads imposed on the rail pad. The arrangement provides facility for economical repair in the field of single web rail girder frames in which there has been failure of the welded joint between the rail girder and the rail pad.
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